Kennebec County, Maine

Kennebec County population, land area and income

Kennebec County had 128,461 residents in the Census Vintage 2024 estimate, on 867.5 square miles of land. It ranks 4th of 16 in Maine by population and 10th by land area. That works out to 148.1 people per square mile, 1.5 times the US average of 96.3, and in the top quarter nationally.

The median county-equivalent in Maine has 54,142 residents, so Kennebec County is 2.4 times that size.

Its SAIPE 2023 median household income of $64,643 is above the national county median among 3,143 counties with an estimate.

How Kennebec County's population changed since 2020

Kennebec County gained 3,738 residents between the July 2020 and July 2024 estimates, a rise of 3.0%. That ranks 9th 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, Kennebec County recorded 4,630 births and 6,683 deaths, a natural change of -2,053. Net international migration added +906 and net domestic migration, people moving to or from other US counties, came to +5,003. The largest single component was domestic migration, which added 5,003 people.

Where Kennebec County is

The Census internal point of Kennebec County is at 44.417000, -69.765800. 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 Kennebec County outlined. Dots are towns of 1,000+ people with residents in it.

Towns in Kennebec County

4 incorporated places of 1,000+ people have residents in Kennebec County, 45,283 people together, or 35% of the county. Each figure counts only the part of the town inside Kennebec County; towns marked "part" extend into another county. The largest is Augusta with 19,168.

Counties bordering Kennebec County

The Census 2024 county adjacency file lists 6 neighbors for Kennebec County. The most populous is Androscoggin County, ME, with 115,272 residents. Distances run between Census internal points in a straight line.

• Androscoggin County

  115,272 people

  28 mi SW

• Somerset County

  51,338 people

  76 mi N

• Waldo County

  40,617 people

  32 mi E

• Sagadahoc County

  37,582 people

  35 mi S

• Lincoln County

  36,491 people

  32 mi SSE

• Franklin County

  30,902 people

  50 mi NW

Distance to Augusta and the nearest big city

Augusta is 7.6 miles S of Kennebec County's internal point in a straight line. The nearest place of 100,000 or more is Manchester, NH (population 116,386), 129.7 miles away. The nearest place of 10,000 or more is Augusta, ME (population 19,168), 5.9 miles away.

Kennebec County FIPS code

The FIPS code of Kennebec County is 23011: state code 23 for Maine plus county code 011. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $64,643.