Columbia County GIS Maps

Columbia 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.

Columbia County Parcels

Columbia County has 43,573 mapped parcels covering 494,283 acres. The median assessed value is $175,600. The median lot size is 1.27 acres. 13,395 parcels are 10 acres or larger. The records carry 24,573 distinct owner names. Owner names, mailing addresses and lot sizes are on nearly every parcel. Site addresses reach 58.5%. Assessed values reach 90.1%. Browse the interactive Columbia County Parcel viewer here.

Columbia County Parcel Data Coverage

Field coverage measured across all Columbia County parcel records. Download free sample data here.

Columbia County Population

Columbia County had 58,490 residents in 2020. That was 2.9% higher than in 2010. Columbia County added 6,022 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 76 people per square mile. Some of the county's most populated postal areas include Portage, Lodi and Columbus.

Population Trend in Columbia County WI

Columbia County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.

Columbia County Zip Codes

Columbia County has 13 zip codes. Some of the county's most populated zip codes include Portage (53901), Lodi (53555) and Columbus (53925). Portage is the largest zip by population, with about 14,924 residents or 26% of the county total. Together, the three largest zips account for about 55% of all county residents based on 2020 population estimates.

Most Populated Zip Codes in Columbia County WI

Columbia County Zip Code populations and trends per most recent census data.

Columbia County Demographics

Columbia County has a median age of 43.3, which makes the county a little older than Wisconsin overall. About 20.8% of residents are under 18, while 19.1% 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 30.7% of the population, which points to a solid working-age base. About 25.7% 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 Columbia County WI

Columbia County School Districts

Columbia County is served by 13 public school districts with 17,413 students enrolled in 2024. The largest districts on the county map are DeForest Area, Sauk Prairie and Portage Community. Those three districts account for about 51% 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 Columbia County WI

Columbia County school district enrollment and trends per most recent NCES reporting data.

Columbia County Housing & Real Estate

Columbia County has a median home value of $258,700 and a median gross rent of $926. About 77% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run above the Wisconsin median, while rents come in below the state average. In March 2026, the median listing price was $424,000 and homes spent about 61 days on the market.

Businesses in Columbia County, WI

Columbia County has 2,752 business listings across 520 categories. The largest categories in Columbia County business listings are Churches & Religious Organizations (84, 3.1%), Parks & Recreation (52, 1.9%), and Farm (41, 1.5%). The full Columbia County business listings dataset includes names, categories, addresses and contact details where available. Columbia County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.

Top Business Categories in Columbia County, WI

Columbia County Business Listings

Columbia County business listings sourced from Overture Maps. Includes locations with a high level of confidence.

Columbia County Basemaps

Columbia 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.

Preview a Live Package Demo

See exactly what is included in a county data package. Inspect how files are organized, the interactive data explorer and how maps and analytics are laid out. The demo loads a real sample package from Wisconsin — explore the full structure before you buy.