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Population of Counties in Maine (2024)

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2024 Population
Growth Since 2020
Area (mi²)
Density (/mi²)
Cumberland County311,6232.65%323373Cumberland County location
York County220,2223.75%383222York County location
Penobscot County155,8962.45%1.3K46Penobscot County location
Kennebec County127,9832.62%335148Kennebec County location
Androscoggin County114,3052.82%181244Androscoggin County location
Aroostook County67,3800.47%2.6K10Aroostook County location
Oxford County60,3524.24%80229Oxford County location
Hancock County56,5031.79%61336Hancock County location
Somerset County51,4862.01%1.5K13Somerset County location
Waldo County40,9853.35%28256Waldo County location
Knox County40,7750.3%141112Knox County location
Sagadahoc County37,6542.51%98148Sagadahoc County location
Lincoln County36,7294.16%17681Lincoln County location
Washington County31,5831.59%98912Washington County location
Franklin County31,0615.41%65518Franklin County location
Piscataquis County17,5694.53%1.5K4Piscataquis County location

There are 16 counties in Maine. Of the 16, the most populous is Cumberland County with a population of 293,557, about 21.93% of Maine’s total population. York County is Maine’s second-most populated county with 206,229 people, followed by Androscoggin County with 107,679 people. Cumberland County and York County have both grown since the 2010 Census, 4.30% and 4.57% respectively, while Angroscoggin Country’s population has declined slightly by 0.03%.

Maine Counties with the Fewest Residents

The Maine county with the fewest resident is Piscataquis County, home to just 16,800 people. Its population density is about 4.24 persons per square kilometer, the lowest in Maine. In addition to its already smallest population, Piscataquis County has also shrunk by 4.27% since 2010.

The second-least populous county in Maine is Franklin County, with 29,897 people, followed by Washington County with 31,490 people. Both counties have experienced population decline since 2010 of 2.68% and 4.08% respectively.

Maine Counties with Rapid Growth

York County, the state’s second-most populous county, has experienced the greatest population growth since 2010 of 4.57%. Its estimated 2020 population growth rate is 0.83%. The state’s largest county, Cumberland County, has had the second-highest population growth since 2010 of 4.30%.

This is followed by Waldo County, which has experienced a growth of 2.25% since the last Census in 2010.

Lists of Counties in all States

  1. Maine Office of Policy and Management
  2. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  3. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  4. American Community Survey (2009 - 2013)
  5. Census QuickFacts
  6. Historical Populations of States and Counties (1790 - 1990)