Williams Bay, WI

Williams Bay takes its name from Captain Israel Williams of Massachusetts, who arrived on the north shore of Geneva Lake in 1837, according to the village's Wikipedia history. The lakeside trail is far older than the village: a historic marker quoted by VISIT Lake Geneva dates its use back to 2500 BC, and it is the ancestor of today's Geneva Lake Shore Path.

The lake turned into a summer destination for Chicago after the Great Chicago Fire of 1871, and Williams Bay took a slightly different path than the estate shore to the east and south. It became a place for camps, a college and science. Camp grounds and the campus that became George Williams College took up large parcels on the west shore in the late 1800s, and in 1897 the University of Chicago opened Yerkes Observatory on the west side of the village, home to the 40-inch refractor.

Two more chapters are worth knowing. From 1950 to 1960 the village hosted the Williams Bay Air Force Station, a radar site. And the rail line that once ended here, a Chicago and North Western branch, stopped running in the 1960s.

What that history means for a buyer today is land. The camps, the college and the observatory each held large lakefront parcels for more than a century. That is why so much of Williams Bay's shoreline was never cut into private lots, and why the future of those parcels (covered in the development section) matters more here than in most lake towns.

Geneva Lake is about nine miles long and up to 142 feet deep, according to the Town of Linn's history page. Three municipalities sit on its shore with their own downtowns: the City of Lake Geneva at the east end, the Village of Fontana-on-Geneva Lake at the west end, and Williams Bay in the middle of the north shore. The Towns of Linn and Walworth hold most of the remaining shoreline.

Williams Bay is small. The 2024 Census gazetteer puts the village at 2.78 square miles of land. The 2020-2024 Census ACS counts 2,981 residents and 2,173 housing units. The Wisconsin Department of Administration's 2025 estimate, printed in the DOR's 2025 Town, Village and City Taxes report, is 3,025.

The number that tells you the most about the market is this one. Of those 2,173 homes, the ACS classifies 853, about 39%, as seasonal, recreational or occasional use. The village's own site says its summer population nearly doubles. Among the homes that are lived in year-round, 77% are owner-occupied. So you are buying into two markets at once: a year-round village with its own schools and a second-home market that runs on the lake calendar.

Coming from Lake County, Illinois, the first thing the buyers I talk to compare is the tax bill, and the second is the drive. Williams Bay is about 46 miles from Vernon Hills by road. That is close enough for a Friday-night arrival and a Sunday-night return, which is how most of the seasonal side of the market uses it.

The 2025 effective tax rate of $8.74 per $1,000 is lower than most of what my Lake County, Illinois clients pay at home.

So much of the village's shoreline is held by institutions and the private frontage that exists rarely trades. The bay is the busiest part of the lake's north shore in summer, and the resort on the west shore will add to that if it is built.

Williams Bay has no official neighborhoods, but it is not one market. The split that moves price the most is distance to the water, and the second is which side of the bay you are on. The village wraps around the bay, with the beach, launch and small downtown at the head of it, the old institutional campuses along the west shore, and the conservancy and newer subdivisions inland to the north.

The Census ACS shows how mixed the housing is. About 70% of homes are single-family detached, but roughly 293 are in three- and four-unit buildings and 136 are in buildings of 20 to 49 units. That mix is unusual for a Geneva Lake village and it is why Williams Bay has more entry points under $500,000 than Fontana.

The pockets below are how buyers and listings describe the village. Boundaries are informal, and I have only named places that public sources name.

Williams Bay's housing is older than most Lake County, Illinois suburbs and younger than the estate shore. The 2020-2024 ACS counts about 333 homes built before 1940, roughly 15% of the stock. Another 556 were built between 1940 and 1969. The 1980s and 1990s added about 612 homes, and the years since 2000 added about 526.

In practice that means four types you will see on a tour. Pre-war cottages and lake houses near the bay, often on small lots, many of them winterized in stages. Post-war ranches and Cape Cods on the inland streets. 1980s and 1990s condos and townhomes, which explain most of the multi-unit count. And newer custom homes, either on infill lots or replacing an older cottage on a lake-access or lakefront parcel.

The ACS median value for owner-occupied homes is $444,700 (margin of error about $38,800). Treat that as a floor for the year-round stock, not a market price. Seasonal homes are excluded from that figure, and they are the more expensive half of the village.

The surprises I would budget for on an older Williams Bay house are the same ones I see on old housing in Illinois lake towns like Fox Lake and Antioch: a cottage that was built for summer and insulated later, a foundation that has seen lake-level water, and additions without permits. On anything near the water, add one more: whether the pier, boathouse or seawall was ever permitted. That question is covered in the shoreland section below.

Williams Bay has three price tiers and they barely overlap. Off-lake homes in the village trade on the village medians covered in the market section. Lake-access homes, where an association or deeded easement gives you a pier slip or a shared shoreline, sit in between. Private lakefront, with your own frontage on Geneva Lake, is its own market, and on this lake most of it never reaches the public listing services.

The Census ACS gives a rough count of the top tier among year-round owners: about 74 owner-occupied homes valued at $1 million or more, roughly 8% of them. That count leaves out every seasonal lake house, so the real number of $1 million-plus properties in the village is higher.

For the lake as a whole, the reporting is consistent. The Real Deal, quoting a local lakefront broker in June 2025, put the share of lakefront deals that are never formally listed at about 70%, and a buyer's agent said annual lakefront sales had dropped from about 12 to 18 a year to roughly half that. In November 2025 the same outlet counted seven lakefront sales since October, four above $8 million. The largest recorded sales on the lake have been on the south shore in the Town of Linn, and the biggest sale of early 2026 was a $14.3 million Fontana estate, per The Real Deal in June 2026; none of the top sales I found were in Williams Bay. In June 2026 the lake's top active listing was a 21-acre estate on South Lake Shore Drive at $24 million, per The Real Deal.

I could not find a public, dated Williams Bay lakefront sale to quote here, and I won't estimate one. What I can say honestly is how to approach it. Williams Bay's lakefront is limited by the institutional land on the west shore, so the private frontage that exists changes hands rarely. The buyers I talk to in Illinois usually start by asking for "a house on the lake under $3 million." On Geneva Lake that usually means lake access rather than frontage, and the conversation goes better when that is clear on day one.

Buying here in practice means three things: being known to the agents who hear about lakefront before it is listed, being ready with proof of funds, and knowing the pier and shoreland rules before you fall for a boathouse.

Williams Bay is a thin market, so monthly numbers jump around. Zillow's home value index is the steadier read: the typical Williams Bay home was worth $549,741 in August 2026, up 3.8% from $529,392 a year earlier and up 5.9% from August 2024.

Redfin's public market data shows how small the sample is. From June 2025 through May 2026, Redfin recorded 73 sales in the village, which is about six a month. The monthly median sale price in that window ranged from $350,000 (March 2026, three sales) to $670,000 (October 2025, 13 sales). In May 2026, the latest month in the file, the median was $570,000 on five sales. That is why I don't quote a single month's median for a village this size.

Inventory is the number that changed. Redfin counted 52 active listings in May 2026, up from 32 in May 2025. More listings and a flat sales pace mean more choice for buyers of off-lake homes and less pressure to waive contingencies. It does not mean the same thing on the lakefront, where supply is still the constraint.

The mix matters too. The village median blends condos, inland ranches and the occasional lake-access home. A seasonal cottage two blocks from the beach and a newer house on an inland street can sell for the same price and have nothing else in common. If you are comparing Williams Bay with Lake Geneva or Fontana, compare the same kind of house: Zillow's August 2026 index was $420,272 for the City of Lake Geneva and $680,700 for Fontana.

Wisconsin property tax works differently from what Illinois buyers are used to, and the vocabulary is the first hurdle. Your local assessor sets an assessed value. Every year the Department of Revenue sets an equalized (full market) value for the whole municipality. The ratio between the two is the assessment level, and the tax rate is applied to assessed value. In the DOR's 2025 Town, Village and City Taxes report, Williams Bay's assessment level is 1.01, its gross full-value rate is $9.79 per $1,000 and its effective rate after the school levy credit is $8.74 per $1,000. The Walworth County average effective rate is $10.56 and the City of Lake Geneva's is $12.28.

The Walworth County Treasurer's 2025 rate sheet shows where the money goes. Per $1,000 of assessed value for tax year 2025: Walworth County $2.17, the Village $2.60, the Williams Bay School District $4.38 and Gateway Technical College $0.52, less a school levy tax credit of $1.04. That nets to about $8.63 per $1,000 of assessed value.

Here is my arithmetic on two purchases, assuming the house is assessed at the village's 1.01 level and before any credit that depends on the owner. A $600,000 house: about $5,230 a year. A $3,000,000 lakefront house: about $26,160 a year. Coming from Lake County, Illinois, where effective rates of 2.5% to 3% are common, that is the comparison that gets people's attention.

Two Wisconsin credits are worth understanding. The lottery and gaming credit applies only to a Wisconsin resident's primary residence as of January 1, and the DOR says plainly that it does not apply to vacation homes. For 2025-26 its maximum credit value is $27,000 of value, per the DOR's November 2025 notice, multiplied by the school tax rate. At Williams Bay's school rate that works out to roughly $118 by my arithmetic. The first dollar credit, with a $9,000 maximum credit value, applies to improved parcels. Neither changes the picture much; the point is that an Illinois buyer's second home will not get the lottery credit.

When you sell, Wisconsin charges a real estate transfer fee of $0.30 per $100 of value, or $3 per $1,000. On a $3,000,000 sale that is $9,000. This is general information, not tax advice. Your actual bill depends on your parcel's assessment, your credits and the year.

If you buy on Geneva Lake, three layers of rules apply to what you can do at the water. The State of Wisconsin owns the lakebed below the ordinary high-water mark, and the Department of Natural Resources regulates piers, boat lifts and shoreline work waterward of that line. Shoreland zoning governs what you can build on land near the lake. And the lake municipalities jointly regulate boating.

On zoning, the DNR explains that counties apply the statewide shoreland standards to unincorporated land within 1,000 feet of a lake, while cities and villages adopt their own shoreland-wetland rules. Williams Bay is a village, so the Village of Williams Bay, not Walworth County, is the first call on setbacks, additions and teardowns inside village limits. Ask for the zoning district and any nonconforming-structure status of a house before you price a renovation.

On the water, Lake Geneva, Williams Bay, Fontana and the Towns of Linn and Walworth adopt one Joint Uniform Lake Law Ordinance. In the version on file with the DNR, the daytime speed limit is 35 mph from Friday noon through Sunday between May 15 and September 30 and on the three summer holidays, 45 mph at other times, and 15 mph after sunset year-round. Where no lane is marked, the traffic lane starts 200 feet from shore and 100 feet from any pier, raft or mooring area, and inside that zone boats must keep to slow-no-wake.

The checklist I would use on any shoreline house: a current survey showing the high-water mark and the pier; copies of every pier, boathouse and shoreline permit; who owns and maintains any shared pier; and what the association documents say about slips. A pier or boathouse that was never permitted can be a real problem at resale.

Inside the village, most homes are on public sewer. The Walworth County Treasurer's 2025 rate sheet carries a Walworth County Metro Sewer line for Williams Bay, the regional sewerage district that treats the village's wastewater. That is a meaningful difference from the Towns of Linn and Walworth next door, where many lake homes rely on private wells and septic systems. If you are looking at a property near the village edge, confirm the sewer and water connection for that specific parcel; an address in the 53191 ZIP code is not proof it is inside the village.

The village runs its own police department, and village hall is at 121 North Walworth Avenue, per the village's site. Electricity and natural gas come from the regional utility; ask the seller for twelve months of bills on any house used seasonally, because a lake cottage heated only on weekends will show very different numbers than a full-time home.

Williams Bay is one of the few Geneva Lake communities with its own kindergarten-through-12th-grade district. Most of the lake is served by small K-8 districts that feed a separate union high school. In Williams Bay, the Williams Bay School District runs an elementary school, a middle school and a high school, with 606 enrolled in 2024-25.

The district's boundary is not the village boundary. The county's 2025 tax sheet shows the Williams Bay School District also levying in parts of the Towns of Linn, Walworth and Geneva. Confirm the district for any specific address with the district before you write an offer, and check the county's list of public school districts (revised August 2026) for contacts.

Williams Bay is a driving market. State Highway 67 runs through the village north to south and State Highway 50 crosses just north of it toward Lake Geneva and Delavan. From Illinois, most people come up U.S. 12 or Highway 47 and cross the state line near Richmond or Genoa City.

I ran the drives on a public routing engine (OSRM, October 5, 2026, no traffic). Treat these as estimates and add time for weekend traffic in summer. From the village center: Vernon Hills about 46 miles and 66 minutes; downtown Lake Geneva about 6 miles and 11 minutes; downtown Milwaukee about 52 miles and 64 minutes; Milwaukee's Mitchell Airport about 48 miles and 60 minutes; the Chicago Loop about 81 miles and just under two hours. O'Hare is about 68 miles; the routing engine gave close to two hours, which I would treat as a ceiling outside rush hour.

The practical point for Lake County, Illinois buyers is that Williams Bay is closer than it feels. From Vernon Hills, it is about the same drive as getting to the Loop at rush hour. That is why so many second-home buyers here commute in on Friday and leave Sunday night, and why the Sunday-evening southbound traffic on 12 is something you plan around.

There is no train to Williams Bay, but there are three Metra terminals within an hour. The closest is Harvard, Illinois, on the Union Pacific Northwest line, about 14 miles and 21 minutes by the routing estimate. In Metra's schedule feed for the week of October 5, 2026, Harvard has 14 weekday trains toward Chicago. The early-morning departures (5:30, 6:00, 6:30 and 7:00 a.m.) reach Ogilvie Transportation Center in 92 minutes.

Fox Lake, the end of the Milwaukee District North line, is about 28 miles and 38 minutes away. It has 16 weekday inbound trains in the same feed, most taking 88 to 93 minutes to Union Station. Kenosha, on the Union Pacific North line, is about 39 miles and an hour east, with 10 weekday inbound trains at about 92 minutes.

For Milwaukee and the airport, Amtrak's Hiawatha between Chicago and Milwaukee stops at Sturtevant, about an hour east by road, and at Milwaukee Airport station. I did not pull the Amtrak timetable for this draft, so check Amtrak for current times.

The honest summary: a Williams Bay house works as a weekend or remote-work base for Chicago. A daily train commute from here means a drive to Harvard plus about an hour and a half on Metra each way.

The village beach at the head of the bay is the center of summer in Williams Bay. The village's fee page lists daily admission fees, with separate order forms for resident beach tags, guest passes and parking passes, and for non-resident tags.

The public launch is at 89 East Geneva Street. Its 2026 fee sheet shows how the village prices access. Non-motorized boats launched at the west ramp pay $2 a day or $20 a year. For powerboats 20 to 25 feet 11 inches, a Williams Bay resident pays $23 a day or $230 a year, and a non-resident $35 a day or $350 a year. Boats 26 feet and up pay $27 or $270 for residents and $41 or $410 for non-residents. Boats under 20 feet pay the same $19 a day or $190 a year either way. The launch is open 24 hours, staffed 6 a.m. to 9 p.m. on weekdays and from 5 a.m. on weekends between Memorial Day and Labor Day, takes credit cards only, and has about 45 parking spaces with overflow at the Lions Field House.

The village also keeps a dry-storage wait list, and the harbor master's office handles moorings. If a slip or a mooring matters to you, ask about the wait before you buy rather than after. On Geneva Lake, deeded and association slips have become valuable enough that brokers track them separately; The Real Deal reported in June 2025 that slip prices at one marina on the lake had quadrupled since the pandemic.

Kishwauketoe Nature Conservancy is the reason a lot of buyers fall for Williams Bay. The village bought the 231-acre property in 1990, according to the Friends of Kishwauketoe, and it has been restored with donations since. It runs from the lakeshore inland, with more than four miles of trails, a boardwalk over the wetland, an observation tower and a pavilion. The habitats include wetland, prairie, oak woods, a kettle, two creeks and an arboretum that holds Level 1 accreditation from ArbNet. The entrance is at 251 Elkhorn Road and it is open to the public year-round.

The Geneva Lake Shore Path runs through the village too. VISIT Lake Geneva describes it as a 21- to 26-mile walk around the lake, preserved under an early rule that the 20 feet along the shoreline stay open to the public. Owners maintain the path across their own frontage, which is why it changes from brick to grass to stepping stones from one house to the next. It takes most walkers eight to ten hours to do the whole loop, so people walk it in sections from the public access points in Lake Geneva, Fontana and Williams Bay. Bikes are not allowed, and leashed dogs are. If you buy lakefront, you are hosting a public path, and that is part of the deal.

Winter is real here. The village lists ice skating, ice fishing, ice boating and snowmobiling alongside the summer swimming, paddling and fishing. The village also hosts the Belfry Theatre, which Wikipedia describes as Wisconsin's first summer stock theater.

Yerkes Observatory is the landmark Williams Bay is known for beyond the lake. The University of Chicago opened it in 1897, and the Great Refractor, its 40-inch lens telescope, is the largest refracting telescope ever built and used for astronomy, as the village notes. The observatory is now run by the nonprofit Yerkes Future Foundation.

Visiting is by advance ticket during scheduled tours and events, with tickets released two months ahead, per the Yerkes tours page. The grounds and outdoor trails are open sunrise to sunset without a ticket. The night-sky tours through the Great Refractor were sold out for 2026 when I checked, and the annual Candlelight Walk runs October 23 and 24, 2026, from 7 to 9:30 p.m.

For a buyer, Yerkes matters for two reasons beyond the view. The observatory property is protected open space next to the former George Williams College campus, which At The Lake Magazine reports carries a 50-acre Yerkes conservation easement. And the observatory is part of why Williams Bay talks about dark skies; the Kishwauketoe conservancy names dark-sky protection in its mission. If outdoor lighting rules matter to your plans for a house, ask the village what applies.

The biggest change coming to Williams Bay is on the west shore. Aurora University's former George Williams College campus, 137 acres overlooking the lake, is owned by Topography LLC, which plans a resort called The Preserve at Williams Bay. According to At The Lake Magazine (February 18, 2026), the Village Board approved the final plan 5-2 in February 2026.

The approved plan centers on a 68-key resort on a 40-acre campus, with rooms in a central lodge and detached one-, two- and three-bedroom cottages. Ten cottages are to be sold as condotel units, limited to 90 nights a year and 28 consecutive nights. The rest of the land, about 90 acres of the former golf course, is under a conservation easement contiguous to the 50-acre Yerkes easement, with prairie restoration that began with a controlled burn in fall 2025 and a 2030 completion target. Public access to the shore path is to be preserved, new public paths are planned to connect the shore path with North Lake Shore Drive, and the 90-acre preserve is to be open to the public.

The same article reports a projected room rate of $1,500 a night or more, a club membership projected above $50,000 a year, and at least $1.5 million a year in tax revenue at full operation. As of December 2025 the developer said construction would start once the capital raise was complete; the article put a possible start in 2026 and an ambitious opening goal of 2027. I have not seen a groundbreaking reported.

What it means for buyers: if the resort is built, the west shore gets a hotel, more summer traffic on North Lake Shore Drive and a large permanently protected preserve. For owners near the campus, I would read the approved plan's traffic and event conditions before buying, and ask the village for the current schedule.

The Williams Bay Police Department provides police service in the village. I don't characterize the safety of any town or neighborhood. Anyone who wants the reported figures can contact the department through the Village of Williams Bay or look them up in the FBI's Crime Data Explorer.