Maine Citizen Population By County in 2023 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2023, the citizen population for Maine was 1,353,085 and represented 98.24% of the total Maine population.

Among all Maine counties, Cumberland had the highest citizen population (296.25K), followed by York (211.43K), and Penobscot (151.21K).

In terms of percentages, Lincoln had the highest percentage of its population being citizens (99.47%), followed by Somerset (99.42%), and Oxford (99.25%).

The chart and table below shows the citizen population of each county and the percentage of each county's population that were citizens.

You can see similar information for other states and by state for the United States.

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Maine Citizen Voting-age Population By County in 2023

Data Source: US Census - ACS 5-Year (CVAP).

See this for other years:

Maine Citizen Population By County in 2023

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County	Citizen Population	% of County Population
Cumberland	296250	96.83
York	211425	98.46
Penobscot	151210	98.46
Kennebec	124485	99.10
Androscoggin	109475	97.46
Aroostook	66250	98.55
Oxford	58290	99.25
Hancock	55305	98.61
Somerset	50555	99.42
Knox	40280	98.58
Waldo	39620	99.04
Sagadahoc	36735	99.03
Lincoln	35650	99.47
Washington	30835	98.64
Franklin	29815	98.91
Piscataquis	16905	98.72