Maine Citizen Population By County in 2019 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2019, the citizen population for Maine was 1,314,655 and represented 98.44% of the total Maine population.

Among all Maine counties, Cumberland had the highest citizen population (284.63K), followed by York (201.68K), and Penobscot (149.73K).

In terms of percentages, Franklin had the highest percentage of its population being citizens (99.38%), followed by Oxford (99.31%), and Somerset (99.28%).

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 2019

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

See this for other years:

Maine Citizen Population By County in 2019

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County	Citizen Population	% of County Population
Cumberland	284625	97.37
York	201675	98.71
Penobscot	149725	98.65
Kennebec	120420	98.90
Androscoggin	105850	98.37
Aroostook	66850	98.58
Oxford	57155	99.31
Hancock	53695	98.34
Somerset	50155	99.28
Knox	39315	98.88
Waldo	39145	99.00
Sagadahoc	34835	98.27
Lincoln	33870	99.04
Washington	30925	98.21
Franklin	29795	99.38
Piscataquis	16620	98.72