Green Lake County GIS Maps
Green Lake County, Wisconsin, has 19,018 residents across 19,471 parcels and covers 349.5 square miles. The population declined 0.2% between the 2010 and 2020 census. More residents left than arrived over that decade. The FIPS code for Green Lake County is 55047.
Berlin is the county's largest population center. Green Lake County also includes 6 zip codes, 7 public school districts and 32 municipalities. Those boundaries help explain why population, schools, and housing can look different from one part of the county to another. The map below shows how those county lines, zip codes, and school districts fit together, and the sections that follow use that same geography to show parcel data, population, demographics, school enrollment and housing patterns in more detail.
Maps, GIS layers, Parcels and sample data. Paid packages add full layers, analytics and database files.
Green Lake County Trends
- Population
- 19,018▾
- Median Home Value
- $206,300▴
- K-12 Enrollment
- 5,083▾
County analytics dashboards with historical trends & projections included in package downloads.
Free starter access previews county maps, lightweight GIS, and sample data. Paid packages unlock full GIS layers, analytics, and database files.
Green Lake County Maps
The maps below show a few of the county map styles included in our downloads. County packages include map exports in JPEG, PNG, SVG, PDF and GeoTIFF formats plus more than 20 GIS layers for mapping, research and analysis. Available layers include zip codes, area codes, subdivisions, school districts, political boundaries, roads, water features, points of interest and more.
County packages also include historical county demographics, business intelligence, analytical dashboards, AI-ready prompts, markdown files and related reference data. Everything is organized to save hours of manual work collecting current data, cleaning it and joining it together. That makes it easier to move faster on analytics, due diligence, business planning and location research. Paid packages are built for commercial use, but some package contents include source-specific attribution or notice guidance. Review Licensing & Data Source Notices.
Green Lake County Parcels
Green Lake County has 19,471 mapped parcels covering 226,165 acres. The median assessed value is $104,600. The median lot size is 1.76 acres. 6,627 parcels are 10 acres or larger. The records carry 11,152 distinct owner names. Owner names, mailing addresses and lot sizes are on nearly every parcel. Site addresses reach 58.4%. Assessed values reach 92.8%. Browse the interactive Green Lake County Parcel viewer here.
Green Lake County Parcel Data Coverage
| Field | Parcels | Coverage |
|---|---|---|
| Parcel ID | 19,471 | 100% |
| Owner name | 19,471 | 100% |
| Owner mailing address | 19,317 | 99.2% |
| Site address | 11,377 | 58.4% |
| Land use code | 18,040 | 92.7% |
| Land use description | 0 | 0% |
| Assessed value | 18,068 | 92.8% |
| Land value | 18,068 | 92.8% |
| Improvement value | 18,068 | 92.8% |
| Acreage | 19,467 | 99.9% |
| Parcel boundary | 19,471 | 100% |
| Download all Green Lake County parcels. | ||
Field coverage measured across all Green Lake County parcel records.
Green Lake County Population
Green Lake County had 19,018 residents in 2020. That was 0.2% lower than in 2010. Green Lake County had 87 fewer people in 2020 than it did in 2000, which points to a long-term population decline. The county is fairly spread out, with about 54 people per square mile. Some of the county's most populated postal areas include Markesan, Princeton and Green Lake.
Population Trend in Green Lake County WI
Green Lake County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Green Lake County Zip Codes
Green Lake County has 6 zip codes. Some of the county's most populated zip codes include Markesan (53946), Princeton (54968) and Green Lake (54941). Markesan is the largest zip by population, with about 4,239 residents or 22% of the county total. Together, the three largest zips account for about 51% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Green Lake County WI
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 53946 | Markesan | 4,239 | ▾ -3.4% |
| 54968 | Princeton | 2,963 | ▴ 6.6% |
| 54941 | Green Lake | 2,543 | ▾ -2.7% |
| 53926 | Dalton | 1,785 | ▴ 9.6% |
| 53939 | Kingston | 248 | ▴ 1.6% |
| Download all zip code data | |||
Green Lake County Zip Code populations and trends per most recent census data.
Green Lake County Demographics
Green Lake County has a median age of 45.5, which makes the county a little older than Wisconsin overall. About 21.7% of residents are under 18, while 22.9% are 65 or older. That gives the county a fairly even mix of younger families and older adults. The largest age group is 25 to 44 at about 25.7% of the population, which points to a solid working-age base. About 22.5% of adults have a bachelor's degree or higher, above the statewide figure of 32.8%. The county is mostly White by population, though Hispanic, Asian, Black and multiracial residents are also part of the local mix.
Key Demographics for Green Lake County WI
Median Age
45.5
Under 18
21.7%
Age 65+
22.9%
Bachelor's+
22.5%
Green Lake County School Districts
Green Lake County is served by 7 public school districts with 5,083 students enrolled in 2024. The largest districts on the county map are Ripon Area, Berlin Area and Markesan. Those three districts account for about 71% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, but it is slightly lower than it was in 2017.
Largest School Districts by Enrollment in Green Lake County WI
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Ripon Area School District | 1,705 | 33.5% | ▴ 3.1% |
| Berlin Area School District | 1,197 | 23.5% | ▾ -7.7% |
| Markesan School District | 721 | 14.2% | ▾ -4.8% |
| Montello School District | 571 | 11.2% | ▾ -0.9% |
| Cambria-Friesland School District | 328 | 6.5% | ▴ 4.8% |
| Download all school district data | |||
Green Lake County school district enrollment and trends per most recent NCES reporting data.
Green Lake County Housing & Real Estate
Green Lake County has a median home value of $206,300 and a median gross rent of $806. About 75% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the Wisconsin median, while rents come in below the state average. In March 2026, the median listing price was $367,485 and homes spent about 83 days on the market.
Green Lake County Housing Mix
Green Lake County housing mix: owner, renter and vacant units.
Green Lake County Housing Trends
Green Lake County median home value and rent trend (last 5 years).
Businesses in Green Lake County, WI
Green Lake County has 959 business listings across 304 categories. The largest categories in Green Lake County business listings are Churches & Religious Organizations (27, 2.8%), Bars & Nightlife (22, 2.3%), and Gas Stations (17, 1.8%). The full Green Lake County business listings dataset includes names, categories, addresses and contact details where available. Green Lake County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Green Lake County, WI
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 27 | 2.8% |
| Bars & Nightlife | 22 | 2.3% |
| Gas Stations | 17 | 1.8% |
| Contractors | 17 | 1.8% |
| Parks & Recreation | 17 | 1.8% |
| Restaurants | 16 | 1.7% |
| Farm | 14 | 1.5% |
| Lake | 13 | 1.4% |
| Banks & Credit Unions | 12 | 1.3% |
| Real Estate Agents | 12 | 1.3% |
Green Lake County Business Listings
| Business | Category | City |
|---|---|---|
| Green Lake Conference Center | Accommodation | Green Lake |
| Pheasants By the Fox | Active Life | Princeton |
| Princeton Acupuncture | Acupuncture | Princeton |
| Gies Equipment Service | Agricultural Service | Berlin |
| Southern Green Lake County | Ambulance And Ems Services | Markesan |
| Shepard's Drive-In | American Restaurants | Berlin |
| Dr Daniel J. Resop, MD | Anesthesiologist | Berlin |
| Green Lake Area Animal Shelter | Animal Shelters | Green Lake |
| River City Antique Mall | Antique Store | Princeton |
| Edgewater Apartments | Apartments | Berlin |
| Download Green Lake County business listings | ||
Green Lake County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Green Lake County Basemaps
Green Lake County map and data packages include a set of useful basemaps to help you get started quickly. These include a custom light grey canvas, USGS topo, imagery and other reference layers that make it easier to build clear, meaningful county maps using the included GIS layers, your own data or both. Pre-rendered map tiles for the light grey basemap are included so you can use them offline or host them on your own CDN.
Get the Full Green Lake County Data Package
This page shows a preview of what's included in the Green Lake County data package. The full package gives you a ready-to-use county data system with GIS layers, historical data, maps, database files and planning tools that save hours of manual data gathering, cleanup and joins. Everything is organized to help you skip data wrangling and start analysis faster.
- 20+ GIS layers for parcels, zip codes, school districts, roads, water, boundaries and more
- Historical county demographics, housing, income and trend data
- ZIP code population files and school district enrollment history
- Database files, markdowns, AI-ready prompts and documentation
- Map exports in PNG, JPEG, PDF, SVG and GeoTIFF formats
- Offline-ready data explorer, map and analytics tools
Paid packages support commercial use, client work, and derived outputs. Some package contents may include source-specific attribution or provider notices. See Licensing & Data Source Notices.
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Nearby Counties
Browse county data pages for the counties that border Green Lake County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.