How many counties in Maine? All 16 listed
Quick answer
Maine has 16 counties and county equivalents holding 1,377,400 residents. The most populous county in Maine is Cumberland County with 305,940 residents; the smallest is Piscataquis County. County boundaries divide the state's land area — measured in square miles by the Census Bureau — into the units used for property assessment, elections and local sales tax. The statewide sales tax base rate is 5.5% with no local add-ons.
All 16 counties
Ranked by population, Census 2019-2023 ACS 5-year estimates.
| County | Population | Median income | Median home value | Median rent |
|---|---|---|---|---|
| Cumberland County | 305,940 | $92,983 | $411,400 | $1,492 |
| York County | 214,731 | $82,904 | $357,200 | $1,239 |
| Penobscot County | 153,571 | $63,248 | $193,800 | $997 |
| Kennebec County | 125,614 | $65,062 | $219,900 | $952 |
| Androscoggin County | 112,323 | $67,298 | $232,000 | $966 |
| Aroostook County | 67,227 | $54,254 | $131,700 | $736 |
| Oxford County | 58,728 | $57,933 | $192,300 | $807 |
| Hancock County | 56,084 | $69,630 | $278,400 | $1,000 |
| Somerset County | 50,852 | $56,199 | $155,200 | $887 |
| Knox County | 40,860 | $71,903 | $290,800 | $1,079 |
| Waldo County | 40,006 | $68,441 | $239,100 | $969 |
| Sagadahoc County | 37,093 | $82,080 | $300,200 | $1,050 |
| Lincoln County | 35,840 | $72,026 | $306,200 | $1,003 |
| Washington County | 31,261 | $52,237 | $147,100 | $768 |
| Franklin County | 30,145 | $58,522 | $176,700 | $759 |
| Piscataquis County | 17,125 | $55,234 | $153,300 | $807 |
Source: US Census Bureau, ACS 2019-2023 5-year estimates · rates as published for 2019-2023 ACS 5-year
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