Name and boundary changes of cities and towns. (Note: in New England,a "town" is a political subdivision of a county, not merely a populated place.)
Each entry has a date, two names, and a "transaction". The latter is a code for the type of event and comes in two flavors, according to which name is given first.
Each event is entered twice, once with each name listed first. Some entries have remarks further explaining the locality. The entries within each county are listed alphabetically by the first name. The entries have the following patterns:
| Abington | came fr | Bridgewater | 1712 |
| Abington | part to | Hanover | 1727 |
| Abington | part as | Rockland | 1874 |
| Abington | part as | S_Abington | 1875 |
| Bear_Cove | became | Hingham | 1635 |
| Bridgewater | came fr | Duxbury | 1656 (New Plantation) |
| Bridgewater | part as | Abington | 1712 |
| Bridgewater | part fr | Stoughton | 1770 |
| Bridgewater | part fr | Stoughton | 1798 |
| Bridgewater | part as | N_Bridgewater | 1821 (N parish) |
| Bridgewater | part as | W_Bridgewater | 1822 |
| Bridgewater | part as | E_Bridgewater | 1823 |
| Bridgewater | part to | Halifax | 1824 |
| Bridgewater | bound | E_Bridgewater | 1846 |
| Brockton | was | N_Bridgewater | 1874 |
| Brockton | bound | S_Abington | 1875 |
| Brockton | part fr | E_Bridgewater | 1875 |
| Brockton | part fr | W_Bridgewater | 1893 |
| Carver | came fr | Plympton | 1790 |
| Carver | part to | Wareham | 1827 |
| Duxbury | was | --- | 1637 |
| Duxbury | part as | Bridgewater | 1656 (New Plantation) |
| Duxbury | annexed | Namassakeesett | 1658 |
| Duxbury | part as | Pembroke | 1712 (Mattakeeset) |
| Duxbury | part to | Kingston | 1857 |
| E_Bridgewater | came fr | Bridgewater | 1823 |
| E_Bridgewater | bound | Bridgewater | 1846 |
| E_Bridgewater | part fr | Halifax | 1857 |
| E_Bridgewater | part to | Brockton | 1875 |
| E_Bridgewater | part to | S_Abington | 1875 |
| Halifax | came fr | Plympton | 1734 |
| Halifax | part fr | Middleborough | 1734 |
| Halifax | part fr | Pembroke | 1734 |
| Halifax | part fr | Bridgewater | 1824 |
| Halifax | part fr | Plympton | 1831 |
| Halifax | part to | E_Bridgewater | 1857 |
| Halifax | bound | Plympton | 1863 |
| Hanover | part fr | Abington | 1727 |
| Hanover | part fr | Scituate | 1727 |
| Hanover | was | --- | 1727 |
| Hanover | bound | Pembroke | 1835 |
| Hanover | bound | S_Scituate | 1878 |
| Hanover | bound | Rockland | 1878 |
| Hanson | came fr | Pembroke | 1820 |
| Hingham | was | Bear_Cove | 1635 |
| Hingham | part as | Cohasset | 1770 |
| Hull | was | Nantasket | 1644 |
| Kingston | came fr | Plymouth | 1726 |
| Kingston | part fr | Duxbury | 1857 |
| Lakeville | came fr | Middleborough | 1853 |
| Marion | came fr | Rochester | 1852 |
| Marshfield | was | Rexham | 1640 |
| Marshfield | part fr | Scituate | 1788 |
| Mattapoisett | came fr | Rochester | 1857 |
| Middleborough | was | Namasket | 1669 |
| Middleborough | part to | Halifax | 1734 |
| Middleborough | part to | Plympton | 1734 |
| Middleborough | part as | Lakeville | 1853 |
| N_Bridgewater | came fr | Bridgewater | 1821 (N parish) |
| N_Bridgewater | became | Brockton | 1874 |
| Namasket | became | Middleborough | 1669 |
| Namassakeesett | joined | Duxbury | 1658 |
| Nantasket | became | Hull | 1644 |
| Norwell | was | S_Scituate | 1888 |
| Pembroke | came fr | Duxbury | 1712 (Mattakeeset) |
| Pembroke | part to | Halifax | 1734 |
| Pembroke | part as | Hanson | 1820 |
| Pembroke | bound | Hanover | 1835 |
| Plymouth | was | --- | 1620 |
| Plymouth | part as | Plympton | 1707 |
| Plymouth | part as | Kingston | 1726 |
| Plymouth | part to | Wareham | 1739 |
| Plymouth | part to | Wareham | 1827 |
| Plympton | came fr | Plymouth | 1707 |
| Plympton | part as | Halifax | 1734 |
| Plympton | part fr | Middleborough | 1734 |
| Plympton | part as | Carver | 1790 |
| Plympton | part to | Halifax | 1831 |
| Plympton | bound | Halifax | 1863 |
| Rexham | became | Marshfield | 1640 |
| Rochester | was | Sippican | 1686 |
| Rochester | bound | Tiverton | 1714 |
| Rochester | part as | Wareham | 1739 |
| Rochester | bound | Fairhaven | 1836 |
| Rochester | part as | Marion | 1852 |
| Rochester | part as | Mattapoisett | 1857 |
| Rochester | bound | Wareham | 1887 |
| Rockland | came fr | Abington | 1874 |
| Rockland | bound | Hanover | 1878 |
| S_Abington | bound | Brockton | 1875 |
| S_Abington | came fr | Abington | 1875 |
| S_Abington | part fr | E_Bridgewater | 1875 |
| S_Abington | became | Whitman | 1886 |
| S_Scituate | came fr | Scituate | 1849 |
| S_Scituate | bound | Hanover | 1878 |
| S_Scituate | became | Norwell | 1888 |
| Scituate | was | --- | 1633 |
| Scituate | part to | Hanover | 1727 |
| Scituate | part to | Marshfield | 1788 |
| Scituate | part to | Cohasset | 1823 |
| Scituate | bound | Cohasset | 1840 |
| Scituate | part as | S_Scituate | 1849 |
| Scituate | bound | Cohasset | 1897 |
| Sippican | became | Rochester | 1686 |
| Tiverton | bound | Rochester | 1714 |
| Tiverton | joined | RI | 1747 |
| W_Bridgewater | came fr | Bridgewater | 1822 |
| W_Bridgewater | part to | Brockton | 1893 |
| Wareham | came fr | Rochester | 1739 |
| Wareham | part fr | Plymouth | 1739 |
| Wareham | part fr | Plymouth | 1827 |
| Wareham | part fr | Carver | 1827 |
| Wareham | bound | Rochester | 1887 |
| Whitman | was | S_Abington | 1886 |