Lake County GIS Maps
Lake County, Montana, has 31,134 residents across 23,015 parcels and covers 1,490.5 square miles. The population grew 8.3% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Lake County is 30047.
Polson is the county's largest population center. Lake County also includes 12 zip codes, 2 public school districts and 11 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.
Lake County Trends
- Population
- 31,134▴
- Median Home Value
- $369,200▴
- K-12 Enrollment
- 656▴
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.
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.
Lake County Parcels
Lake County has 23,015 mapped parcels covering 955,445 acres. The median assessed value is $320,560. The median lot size is 2.84 acres. 7,478 parcels are 10 acres or larger. Improved property accounts for 56.9% of parcels. Vacant land follows at 25.4% and tribal property at 8.4%. The records carry 15,122 distinct owner names. About 14% of parcels list an owner mailing address outside Montana. Owner names, mailing addresses, assessed values and lot sizes are on nearly every parcel. Site addresses reach 84.2%. Browse the interactive Lake County Parcel viewer here.
Lake County Parcel Data Coverage
| Field | Parcels | Coverage |
|---|---|---|
| Parcel ID | 23,015 | 100% |
| Owner name | 22,852 | 99.3% |
| Owner mailing address | 22,803 | 99.1% |
| Site address | 19,371 | 84.2% |
| Land use code | 0 | 0% |
| Land use description | 22,852 | 99.3% |
| Assessed value | 22,660 | 98.5% |
| Land value | 22,660 | 98.5% |
| Improvement value | 22,660 | 98.5% |
| Acreage | 23,015 | 100% |
| Parcel boundary | 23,015 | 100% |
| Download all Lake County parcels. | ||
Field coverage measured across all Lake County parcel records.
Lake County Population
Lake County had 31,134 residents in 2020. That was 8.3% higher than in 2010. Lake County added 4,627 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 21 people per square mile. Some of the county's most populated postal areas include Polson, Bigfork and Ronan.
Population Trend in Lake County MT
Lake County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Lake County Zip Codes
Lake County has 12 zip codes. Some of the county's most populated zip codes include Polson (59860), Bigfork (59911) and Ronan (59864). Polson is the largest zip by population, with about 11,309 residents or 36% of the county total. Together, the three largest zips account for about 88% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Lake County MT
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 59860 | Polson | 11,309 | ▴ 14.1% |
| 59911 | Bigfork | 8,722 | ▴ 13.6% |
| 59864 | Ronan | 7,348 | ▴ 8.8% |
| 59865 | Saint Ignatius | 3,338 | ▴ 4.8% |
| 59824 | Charlo | 1,575 | ▾ -12.1% |
| Download all zip code data | |||
Lake County Zip Code populations and trends per most recent census data.
Lake County Demographics
Lake County has a median age of 43.8, which makes the county a little older than Montana overall. About 22.6% of residents are under 18, while 23.6% 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 27% of the population, which points to a solid working-age base. About 30.5% of adults have a bachelor's degree or higher, above the statewide figure of 34.5%. The county is majority White by population, with Hispanic, Asian, Black and multiracial residents making up a meaningful share of the local mix.
Key Demographics for Lake County MT
Median Age
43.8
Under 18
22.6%
Age 65+
23.6%
Bachelor's+
30.5%
Lake County School Districts
Lake County is served by 2 public school districts with 656 students enrolled in 2024. Several larger districts account for a substantial share of students across the county map area. Those three districts account for about 100% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, based on district totals from 2017 to 2024.
Largest School Districts by Enrollment in Lake County MT
| District | Enrollment | Share | Trend |
|---|---|---|---|
| St. Ignatius K-12 Schools | 459 | 70% | ▾ -0.6% |
| Hot Springs K-12 | 197 | 30% | ▴ 23.9% |
| Download all school district data | |||
Lake County school district enrollment and trends per most recent NCES reporting data.
Lake County Housing & Real Estate
Lake County has a median home value of $369,200 and a median gross rent of $884. About 74% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run above the Montana median, while rents come in below the state average. In March 2026, the median listing price was $699,000 and homes spent about 95 days on the market.
Lake County Housing Mix
Lake County housing mix: owner, renter and vacant units.
Lake County Housing Trends
Lake County median home value and rent trend (last 5 years).
Businesses in Lake County, MT
Lake County has 1,498 business listings across 415 categories. The largest categories in Lake County business listings are Churches & Religious Organizations (45, 3.0%), Lake (41, 2.7%), and Farm (30, 2.0%). The full Lake County business listings dataset includes names, categories, addresses and contact details where available. 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 Lake County, MT
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 45 | 3.0% |
| Lake | 41 | 2.7% |
| Farm | 30 | 2.0% |
| Community & Nonprofits | 27 | 1.8% |
| Gas Stations | 27 | 1.8% |
| Real Estate Agents | 26 | 1.7% |
| Coffee Shops | 26 | 1.7% |
| Structure And Geography | 21 | 1.4% |
| Contractors | 20 | 1.3% |
| Landmark And Historical Building | 16 | 1.1% |
Lake County Business Listings
| Business | Category | City |
|---|---|---|
| Montana Counseling Services | Abuse And Addiction Treatment | Polson |
| Polson, Montana | Accommodation | Polson |
| Davis, Schallock & Brown CPAs | Accountant | Polson |
| McDonald Lake | Active Life | St Ignatius |
| Gateway To Vitality | Acupuncture | Polson |
| Willow Canyon Counseling Services | Addiction Rehabilitation Center | Polson |
| Bishop Signworks | Advertising Agency | Polson |
| Roaming Bison Ranch | Agricultural Production | Saint Ignatius |
| Moiese Fertilizer Co | Agricultural Service | Charlo |
| Sod Buster Sales | Agriculture | Polson |
| Download Lake County business listings | ||
Lake County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Lake County Basemaps
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 Lake County Data Package
This page shows a preview of what's included in the 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.
One-time · instant download · 30-day refund guarantee · See full package details
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 Montana — explore the full structure before you buy.
No email or download required. Opens in a preview window on this page.
Nearby Counties
Browse county data pages for the counties that border Lake County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.