| Massachusetts County Formation years | ||||||||||||||
| 1643 | 1644 | 1652 | 1658 | 1662 | 1663 | 1664 | 1665 | 1668 | 1669 | 1673 | 1674 | 1675 | 1679 | 1680 |
| 1683 | 1685 | 1686 | 1689 | 1690 | 1691 | 1692 | 1695 | 1707 | 1713 | 1716 | 1731 | 1732 | 1735 | 1740 |
| 1742 | 1747 | 1749 | 1760 | 1761 | 1764 | 1765 | 1768 | 1774 | 1779 | 1783 | 1784 | 1785 | 1789 | 1790 |
| 1792 | 1793 | 1797 | 1799 | 1801 | 1803 | 1804 | 1805 | 1807 | 1809 | 1811 | 1812 | 1816 | 1820 | 1822 |
| 1829 | 1830 | 1831 | 1834 | 1835 | 1837 | 1838 | 1841 | 1853 | 1854 | 1855 | 1858 | 1859 | 1862 | 1868 |
| 1870 | 1872 | 1874 | 1909 | 1912 | 1938 | 1947 | ||||||||
| Massachusetts County Census Year with Modern Map overlayed: | ||||||||||||||
| 1800 | 1810 | 1820 | 1830 | 1840 | 1850 | 1860 | 1870 | 1880-1900 | 1910 | 1920-1930 | ||||
| Massachusetts Map Abbreviations | |||
|---|---|---|---|
| unorg. = unorganized g. = gained w. = with fr. = from atmt. = attachment exch = exchanged nca.= non county area ch. = changed |
MASSACHUSETTS Ba - Barnstable Be - Berkshire Br - Bristol Du - Dukes Es - Essex Fr - Franklin Hdn - Hampden Hsr - Hampshire |
Mi - Middlesex Nan - Nantucket No - Norfolk Pl - Plymouth Su - Suffolk Wo - Worcester CONNECTICUT Fa - Fairfield Har - Hartford Lit - Litchfield Mi - Middlesex |
NH - New Haven NL - New London To - Tolland Wi - Windham RHODE ISLAND Pr - Providence Wa - Washington Br - Bristol Knt - Kent Ne - Newport |