Counties of Maine
LocationState of Maine
Populations17,486 (Piscataquis) – 310,230 (Cumberland)
Areas370 square miles (960 km2) (Sagadahoc) – 6,829 square miles (17,690 km2) (Aroostook)

This is a list of the 16 counties in the U.S. state of Maine. Before statehood, Maine was officially part of the state of Massachusetts and was called the District of Maine. Maine was granted statehood on March 15, 1820, as part of the Missouri Compromise. Nine of the 16 counties had their borders defined while Maine was still part of Massachusetts, and hence are older than the state itself.[1][page needed] Even after 1820, the exact location of the northern border of Maine was disputed with Britain, until the question was settled and the northern counties signed their final official form, the Webster–Ashburton Treaty, signed in 1842.[2] Almost all of Aroostook County was disputed land until the treaty was signed.[1][page needed]

The first county to be created was York County, created as York County, Massachusetts, by the government of the Massachusetts Bay Colony in 1652 to govern territories it claimed in southern Maine.[3] No new counties have been created since 1860, when Knox County and Sagadahoc County were created. The most populous counties tend to be located in the southeastern portion of the state, along the Atlantic seaboard. The largest counties in terms of land area are inland and further north. Maine's county names come from a mix of British, American, and Native American sources, reflecting Maine's pre-colonial, colonial, and national heritage.[1][page needed]

The Federal Information Processing Standard (FIPS) code, which is used by the United States government to uniquely identify states and counties, is provided with each entry. Maine's code is 23, which when combined with any county code would be written as 23XXX. The FIPS code for each county links to census data for that county.[4]

Alphabetical list

FIPS code[5] Seat[6] Est.[6] Origin Etymology Population[7] Area[6][8] Map
Androscoggin County 001 Auburn 1854 From parts of Cumberland County, Kennebec County, and Lincoln County The Androscoggin Native American tribe. 113,765 497 sq mi
(1,287 km2)
State map highlighting Androscoggin County
Aroostook County 003 Houlton 1839 From parts of Penobscot County, and Washington County A Mi'kmaq word meaning beautiful river. 67,351 6,829 sq mi
(17,687 km2)
State map highlighting Aroostook County
Cumberland County 005 Portland 1761 As Cumberland County, Massachusetts, from part of York County Prince William Augustus, Duke of Cumberland, son of George II of Great Britain. 310,230 1,217 sq mi
(3,152 km2)
State map highlighting Cumberland County
Franklin County 007 Farmington 1838 From parts of Kennebec County, Oxford County, and Somerset County Benjamin Franklin, the Founding Father, scientist, printer, and diplomat. 30,828 1,744 sq mi
(4,517 km2)
State map highlighting Franklin County
Hancock County 009 Ellsworth 1790 As Hancock County, Massachusetts, from part of Lincoln County John Hancock (1737–1793), the Founding Father and president of the convention that produced the United States Declaration of Independence. 56,526 2,351 sq mi
(6,089 km2)
State map highlighting Hancock County
Kennebec County 011 Augusta 1799 As Kennebec County, Massachusetts, from part of Lincoln County The Kennebec River in Maine. 127,259 951 sq mi
(2,463 km2)
State map highlighting Kennebec County
Knox County 013 Rockland 1860 From parts of Lincoln County and Waldo County Henry Knox (1750–1806), the first United States Secretary of War (1789 - 1794), who lived in Thomaston, Maine. 40,977 1,142 sq mi
(2,958 km2)
State map highlighting Knox County
Lincoln County 015 Wiscasset 1760 As Lincoln County, Massachusetts, from part of York County The city of Lincoln, England. 36,507 700 sq mi
(1,813 km2)
State map highlighting Lincoln County
Oxford County 017 Paris 1805 As Oxford County, Massachusetts, from parts of Cumberland County and York County Probably named for Oxford, Massachusetts. 59,905 2,175 sq mi
(5,633 km2)
State map highlighting Oxford County
Penobscot County 019 Bangor 1816 As Penobscot County, Massachusetts, from part of Hancock County The Penobscot Native American tribe. 155,312 3,556 sq mi
(9,210 km2)
State map highlighting Penobscot County
Piscataquis County 021 Dover-Foxcroft 1838 From parts of Penobscot County and Somerset County An Abenaki word meaning rapid waters. 17,486 4,377 sq mi
(11,336 km2)
State map highlighting Piscataquis County
Sagadahoc County 023 Bath 1854 From part of Lincoln County An Abenaki word meaning mouth of big river. 37,513 370 sq mi
(958 km2)
State map highlighting Sagadahoc County
Somerset County 025 Skowhegan 1809 As Somerset County, Massachusetts, from parts of Kennebec County The county of Somerset in England. 51,302 4,095 sq mi
(10,606 km2)
State map highlighting Somerset County
Waldo County 027 Belfast 1827 From parts of Hancock County, Kennebec County and Lincoln County Samuel Waldo, Maine landowner and a colonial soldier in the 1745 siege of Louisbourg. 40,620 853 sq mi
(2,209 km2)
State map highlighting Waldo County
Washington County 029 Machias 1790 As Washington County, Massachusetts, from part of Lincoln County George Washington, the first President of the United States. 31,555 3,255 sq mi
(8,430 km2)
State map highlighting Washington County
York County 031 Alfred 1652 As Yorkshire County, Massachusetts, from the southern part of the District of Maine. Renamed York County by Massachusetts in 1668 York, England, the birthplace of Christopher Levett who first attempted to settle the area. 218,586 1,271 sq mi
(3,292 km2)
State map highlighting York County


  1. ^ a b c Clark, Charles E. (1990). Maine: A History. University Press of New England. ISBN 0-87451-520-3.
  2. ^ Bassett, John (1913). A Short History of the United States. New York: Macmillan. p. 437. OCLC 869001. pp. 437–438
  3. ^ Clark, Charles E. (1970). The Eastern Frontier: The Settlement of Northern new England, 1610–1763. New York: Alfred A. Knopf. OCLC 94907. p. 50
  4. ^ "FIPS Publish 6-4". National Institute of Standards and Technology. Archived from the original on September 29, 2013. Retrieved April 11, 2007.
  5. ^ "EPA County FIPS Code Listing". Retrieved February 23, 2008.
  6. ^ a b c National Association of Counties. "NACo - Find a county". Archived from the original on April 11, 2008. Retrieved April 30, 2008.
  7. ^ "U.S. Census Bureau QuickFacts: Maine".
  8. ^ "Maine QuickFacts from the US Census Bureau". State & County QuickFacts. Archived from the original on April 10, 2007. Retrieved April 18, 2007.