• county
  • FIPS 23013
  • Largest town: Rockland

Knox County, Maine

Knox County had 40,981 residents in the Census Vintage 2024 estimate, on 364.9 square miles of land. It ranks 10th of 16 in Maine by population and 15th by land area.

Population
40,981
#10 of 16 in Maine · #1,173 in US
Area
364.9 sq mi
#15 of 16 in Maine · #2,642 in US
Density
112 / sq mi
#6 of 16 in Maine · #839 in US
Median household income
$70,533
#6 of 16 in Maine · #963 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Knox County within Maine. Pin: Augusta.

Measure from here

Tools and pages that start from Knox County

Knox County population, land area and income

Knox County had 40,981 residents in the Census Vintage 2024 estimate, on 364.9 square miles of land. It ranks 10th of 16 in Maine by population and 15th by land area. That works out to 112.3 people per square mile, near the US average of 96.3, and above the national county median.

The median county-equivalent in Maine has 54,142 residents; Knox County is somewhat smaller.

Its SAIPE 2023 median household income of $70,533 is above the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

40,981

3144th1st

1173rd of 3,144 (US)

Land area

365 sq mi

3144th1st

2642nd of 3,144 (US)

Density

112.3 / sq mi

3144th1st

839th of 3,144 (US)

Median household income

$70,533

3143rd1st

963rd of 3,143 (US)

Rank within Maine (16)

Population

40,981

16th1st

10th of 16 (ME)

Land area

365 sq mi

16th1st

15th of 16 (ME)

Density

112.3 / sq mi

16th1st

6th of 16 (ME)

Median household income

$70,533

16th1st

6th of 16 (ME)

How Knox County's population changed since 2020

Knox County gained 318 residents between the July 2020 and July 2024 estimates, a rise of 0.8%. That ranks 15th of 16 in Maine for growth. The median Maine county changed by +3.0%, and the state as a whole by +3.0%.

Since the April 2020 estimates base, Knox County recorded 1,175 births and 2,188 deaths, a natural change of -1,013. Net international migration added +99 and net domestic migration, people moving to or from other US counties, came to +1,311. The largest single component was domestic migration, which added 1,311 people.

40.7k202041.1k202141.3k202241.0k202341.0k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
1,175
Deaths
2,188
Net international migration
+99
Net domestic migration
+1,311
Change, July 2023 to July 2024
-63

Where Knox County is

The Census internal point of Knox County is at 44.042000, -69.038500. It sits in UTM zone 19N. The map shades Maine's 16 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Knox County outlined. Dots are towns of 1,000+ people with residents in it.

York County: +3.7%Hancock County: +2.6%Washington County: +0.9%Aroostook County: -0.4%Androscoggin County: +3.7%Sagadahoc County: +2.3%Franklin County: +4.9%Oxford County: +3.7%Waldo County: +2.4%Somerset County: +1.7%Cumberland County: +3.4%Kennebec County: +3.0%Piscataquis County: +3.8%Penobscot County: +3.1%Knox County: +0.8%Lincoln County: +3.5%
Change 2020 to 2024
  1. < +1.7%
  2. < +2.6%
  3. < +3.4%
  4. < +3.7%
  5. ≥ +3.7%
no data

Orange pin: Knox County internal point. Dark pin: Augusta.

Internal point

Decimal
44.042000, -69.038500
DMS
44°02'31.20"N 69°02'18.60"W
UTM
19N 496915.5E 4876538.4N
Geohash
dryfscxen
Plus code
87PG2XR6+RJ

Towns in Knox County

One incorporated place of 1,000+ people has residents in Knox County, 7,060 people together, or 17% of the county. Each figure counts only the part of the town inside Knox County; towns marked "part" extend into another county. The largest is Rockland with 7,060.

  1. 01Rockland7,060
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Knox County

The Census 2024 county adjacency file lists 3 neighbors for Knox County. The most populous is Hancock County, ME, with 56,946 residents. Distances run between Census internal points in a straight line.

Distance to Augusta and the nearest big city

Augusta is 41.1 miles WNW of Knox County's internal point in a straight line. The nearest place of 100,000 or more is Manchester, NH (population 116,386), 140.9 miles away. The nearest place of 10,000 or more is Augusta, ME (population 19,168), 40.0 miles away.

Knox County FIPS code

The FIPS code of Knox County is 23013: state code 23 for Maine plus county code 013. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $70,533.

Questions people ask

What is the population of Knox County, Maine?

The Census Vintage 2024 estimate for July 1, 2024 is 40,981. That is up 318 people (0.8%) from the July 2020 estimate of 40,663.

What is the FIPS code of Knox County?

23013. The first two digits (23) are Maine; the last three (013) identify the county.

What is the largest town in Knox County?

Rockland, with 7,060 residents inside Knox County in 2024.

Which counties border Knox County?

3 county-equivalents border it in the Census 2024 adjacency file: Hancock County, ME; Waldo County, ME; Lincoln County, ME.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.