Maine County Formation years
1652	1664	1665	1668	1673	1674	1675	1679	1680	1683	1686	1689	1690	1691	1692
1713	1716	1740	1760	1763	1786	1789	1790	1791	1799	1805	1808	1809	1811	1812
1813	1814	1816	1817	1819	1820	1821	1823	1824	1827	1830	1831	1833	1835	1838
1839	1840	1841	1842	1843	1844	1847	1849	1850	1854	1855	1856	1858	1860	1873
1885	1889	1891	1903	1907	1913
Maine Census Year with Modern Map overlayed:
1790	1800	1810	1820	1830	1840	1850	1860	1870	1880	1890	1900	1910	1920-1930

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Maine Map Abbreviations
unorg. = unorganized g. = gained w. = with fr. = from atmt. = attachment exch = exchanged nca.= non county area ch. = changed	An - Androscoggin Ar - Aroostook Cu - Cumberland Fr - Franklin	Ha - Hancock Ke - Kennebec Kn - Knox Li - Lincoln	Ox - Oxford Pe - Penobscot Pi - Piscataquis Sa - Sagahadoc	So - Somerset Wal - Waldo Was - Washington Yo - York