Monroe County GIS Maps
Monroe County, Wisconsin, has 46,274 residents across 39,012 parcels and covers 900.9 square miles. The population grew 3.6% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Monroe County is 55081.
Sparta is the county's largest population center. Monroe County also includes 7 zip codes, 10 public school districts and 58 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.
Monroe County Trends
- Population
- 46,274▴
- Median Home Value
- $197,200▴
- K-12 Enrollment
- 10,769▾
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.
Monroe 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.
Monroe County Parcels
Monroe County has 39,012 mapped parcels covering 580,606 acres. The median assessed value is $76,200. The median lot size is 3.23 acres. 14,696 parcels are 10 acres or larger. The records carry 17,640 distinct owner names. Owner names and lot sizes are on nearly every parcel. Mailing addresses reach 95.3%. Assessed values reach 85.8%. Browse the interactive Monroe County Parcel viewer here.
Monroe County Parcel Data Coverage
| Field | Parcels | Coverage |
|---|---|---|
| Parcel ID | 39,012 | 100% |
| Owner name | 39,005 | 99.9% |
| Owner mailing address | 37,162 | 95.3% |
| Site address | 18,764 | 48.1% |
| Land use code | 33,483 | 85.8% |
| Land use description | 0 | 0% |
| Assessed value | 33,483 | 85.8% |
| Land value | 33,483 | 85.8% |
| Improvement value | 34,371 | 88.1% |
| Acreage | 38,957 | 99.9% |
| Parcel boundary | 39,012 | 100% |
| Download all Monroe County parcels. | ||
Field coverage measured across all Monroe County parcel records.
Monroe County Population
Monroe County had 46,274 residents in 2020. That was 3.6% higher than in 2010. Monroe County added 5,375 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 51 people per square mile. Some of the county's most populated postal areas include Sparta, Tomah and Cashton.
Population Trend in Monroe County WI
Monroe County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Monroe County Zip Codes
Monroe County has 7 zip codes. Some of the county's most populated zip codes include Sparta (54656), Tomah (54660) and Cashton (54619). Sparta is the largest zip by population, with about 18,411 residents or 40% of the county total. Together, the three largest zips account for about 83% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Monroe County WI
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 54656 | Sparta | 18,411 | ▴ 6% |
| 54660 | Tomah | 16,073 | ▴ 2.5% |
| 54619 | Cashton | 4,024 | ▴ 2.6% |
| 54666 | Warrens | 2,587 | ▾ -0.2% |
| 54670 | Wilton | 1,897 | ▴ 1% |
| Download all zip code data | |||
Monroe County Zip Code populations and trends per most recent census data.
Monroe County Demographics
Monroe County has a median age of 39.6, which makes the county a little younger than Wisconsin overall. About 25.4% of residents are under 18, while 17.6% 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 29.6% of the population, which points to a solid working-age base. About 20% 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 Monroe County WI
Median Age
39.6
Under 18
25.4%
Age 65+
17.6%
Bachelor's+
20%
Monroe County School Districts
Monroe County is served by 10 public school districts with 10,769 students enrolled in 2024. The largest districts on the county map are Tomah Area, Sparta Area and Westby Area. Those three districts account for about 62% 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 Monroe County WI
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Tomah Area School District | 2,970 | 27.6% | ▾ -2% |
| Sparta Area School District | 2,749 | 25.5% | ▾ -1.6% |
| Westby Area School District | 993 | 9.2% | ▴ 1.2% |
| Melrose-Mindoro School District | 726 | 6.7% | ▴ 0.8% |
| Bangor School District | 665 | 6.2% | ▴ 2.6% |
| Download all school district data | |||
Monroe County school district enrollment and trends per most recent NCES reporting data.
Monroe County Housing & Real Estate
Monroe County has a median home value of $197,200 and a median gross rent of $920. About 72% 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 $279,950 and homes spent about 87 days on the market.
Monroe County Housing Mix
Monroe County housing mix: owner, renter and vacant units.
Monroe County Housing Trends
Monroe County median home value and rent trend (last 5 years).
Businesses in Monroe County, WI
Monroe County has 1,945 business listings across 450 categories. The largest categories in Monroe County business listings are Churches & Religious Organizations (53, 2.7%), Auto Repair (29, 1.5%), and Beauty Salons (27, 1.4%). The full Monroe County business listings dataset includes names, categories, addresses and contact details where available. Monroe County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Monroe County, WI
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 53 | 2.7% |
| Auto Repair | 29 | 1.5% |
| Beauty Salons | 27 | 1.4% |
| Community & Nonprofits | 27 | 1.4% |
| Parks & Recreation | 26 | 1.3% |
| Gas Stations | 26 | 1.3% |
| Bars & Nightlife | 26 | 1.3% |
| Convenience Stores | 26 | 1.3% |
| Public And Government Association | 26 | 1.3% |
| Farm | 26 | 1.3% |
Monroe County Business Listings
| Business | Category | City |
|---|---|---|
| Dorset Valley Trailside Inn | Accommodation | Wilton |
| Associated Accounting Services | Accountant | Tomah |
| Elroy-Sparta Trail, Norwalk, WI | Active Life | Norwalk |
| 7 Rivers Acupuncture and Chinese Herbal Medicine | Acupuncture | Tomah |
| Baron's Gentlemens Club | Adult Entertainment | Sparta |
| United Cooperative | Agricultural Cooperatives | Wilton |
| St. Joseph Equipment Inc. | Agricultural Service | Norwalk |
| Foremost Farms USA | Agriculture | Sparta |
| Flight Service GSE LLC | Aircraft Repair | Sparta |
| Tomah Airport Office | Airport | Tomah |
| Download Monroe County business listings | ||
Monroe County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Monroe County Basemaps
Monroe 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 Monroe County Data Package
This page shows a preview of what's included in the Monroe 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 Monroe County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.