Knox County GIS Maps
Knox County, Maine, has 40,607 residents across 27,230 parcels and covers 365.1 square miles. The population grew 2.2% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Knox County is 23013.
Rockland is the county's largest population center. Knox County also includes 19 zip codes, 8 public school districts and 30 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.
Knox County Trends
- Population
- 40,607▴
- Median Home Value
- $290,800▴
- K-12 Enrollment
- 3,682▾
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.
Knox 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.
Knox County Parcels
Knox County has 27,230 mapped parcels covering 239,435 acres. The median assessed value is $143,100. Single family homes account for 11.4% of parcels. Res land develop follows at 1.8%. The records carry 8,207 distinct owner names. About 10% of parcels list an owner mailing address outside Maine. Site addresses reach 61.2%. Assessed values reach 51.4%. Browse the interactive Knox County Parcel viewer here.
Knox County Parcel Data Coverage
| Field | Parcels | Coverage |
|---|---|---|
| Parcel ID | 27,231 | 100% |
| Owner name | 9,812 | 36.0% |
| Owner mailing address | 10,182 | 37.4% |
| Site address | 16,674 | 61.2% |
| Land use code | 8,664 | 31.8% |
| Land use description | 5,569 | 20.5% |
| Assessed value | 13,992 | 51.4% |
| Land value | 14,357 | 52.7% |
| Improvement value | 11,323 | 41.6% |
| Acreage | 10,786 | 39.6% |
| Parcel boundary | 27,230 | 99.9% |
| Download all Knox County parcels. | ||
Field coverage measured across all Knox County parcel records.
Knox County Population
Knox County had 40,607 residents in 2020. That was 2.2% higher than in 2010. Knox County added 989 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 111 people per square mile. Some of the county's most populated postal areas include Rockland, Camden and Warren.
Population Trend in Knox County ME
Knox County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Knox County Zip Codes
Knox County has 19 zip codes. Some of the county's most populated zip codes include Rockland (04841), Camden (04843) and Warren (04864). Rockland is the largest zip by population, with about 6,936 residents or 17% of the county total. Together, the three largest zips account for about 42% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Knox County ME
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 04841 | Rockland | 6,936 | ▾ -4.9% |
| 04843 | Camden | 5,241 | ▴ 8% |
| 04864 | Warren | 4,865 | ▴ 2.4% |
| 04862 | Union | 3,794 | ▴ 5.6% |
| 04856 | Rockport | 3,644 | ▴ 9.4% |
| Download all zip code data | |||
Knox County Zip Code populations and trends per most recent census data.
Knox County Demographics
Knox County has a median age of 49.2, which makes the county a little older than Maine overall. About 17.1% of residents are under 18, while 27.1% 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 27.8% of the population, which points to a solid working-age base. About 39.1% of adults have a bachelor's degree or higher, above the statewide figure of 35.3%. The county is mostly White by population, though Hispanic, Asian, Black and multiracial residents are also part of the local mix.
Key Demographics for Knox County ME
Median Age
49.2
Under 18
17.1%
Age 65+
27.1%
Bachelor's+
39.1%
Knox County School Districts
Knox County is served by 8 public school districts with 3,682 students enrolled in 2024. The largest districts on the county map are School Administrative District 40, Regional School Unit 13 and St. George Public Schools. Those three districts account for about 94% 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 Knox County ME
| District | Enrollment | Share | Trend |
|---|---|---|---|
| School Administrative District 40 | 1,761 | 47.8% | ▾ -1.2% |
| Regional School Unit 13 | 1,508 | 41% | ▴ 0.8% |
| St. George Public Schools | 206 | 5.6% | ▴ 4.6% |
| School Administrative District 08 | 143 | 3.9% | ▾ -4.7% |
| School Administrative District 07 | 56 | 1.5% | ▾ -1.8% |
| Download all school district data | |||
Knox County school district enrollment and trends per most recent NCES reporting data.
Knox County Housing & Real Estate
Knox County has a median home value of $290,800 and a median gross rent of $1,079. About 79% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run above the Maine median, while rents come in below the state average. In March 2026, the median listing price was $499,000 and homes spent about 85 days on the market.
Knox County Housing Mix
Knox County housing mix: owner, renter and vacant units.
Knox County Housing Trends
Knox County median home value and rent trend (last 5 years).
Businesses in Knox County, ME
Knox County has 2,960 business listings across 559 categories. The largest categories in Knox County business listings are Farm (55, 1.9%), Art Gallery (54, 1.8%), and Community & Nonprofits (48, 1.6%). The full Knox County business listings dataset includes names, categories, addresses and contact details where available. Knox County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Knox County, ME
| Category | Businesses | Share |
|---|---|---|
| Farm | 55 | 1.9% |
| Art Gallery | 54 | 1.8% |
| Community & Nonprofits | 48 | 1.6% |
| Contractors | 47 | 1.6% |
| Churches & Religious Organizations | 45 | 1.5% |
| Bed And Breakfast | 43 | 1.5% |
| Auto Repair | 41 | 1.4% |
| Restaurants | 39 | 1.3% |
| Landmark And Historical Building | 37 | 1.3% |
| Structure And Geography | 36 | 1.2% |
Knox County Business Listings
| Business | Category | City |
|---|---|---|
| New Season | Abuse And Addiction Treatment | Rockland |
| Samoset Resort | Accommodation | Rockport |
| Heal Accounting | Accountant | South Thomaston |
| Megunticook Rowing | Active Life | Camden |
| Good Hearth Eastern Medical Arts | Acupuncture | Rockland |
| Chilton Creative | Advertising Agency | Camden |
| Melon Togo Rockland | African Restaurant | Rockland |
| Rebel Road Cooperative Farm | Agricultural Cooperatives | Union |
| Black Dirt Guy | Agriculture | Thomaston |
| Penobscot Island Air | Airline | Owls Head |
| Download Knox County business listings | ||
Knox County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Knox County Basemaps
Knox 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 Knox County Data Package
This page shows a preview of what's included in the Knox 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 Knox County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.