Suggestions for additions and corrections are welcome. We wish to provide the most accurate information possible.
| Town | Founded | Separated from Original Names; Notes; etc. |
| Barrington | 1717 | From Massachusetts as part of the new town of Warren in 1747, re-established as Barrington in 1770 |
| Bristol | 1681 | From Massachusetts in 1747; called Mt. Hope in 1697 |
| Burrillville | 1806 | From Glocester |
| Central Falls | 1895 | From Lincoln |
| Charlestown | 1738 | From Westerly |
| Coventry | 1741 | From Warwick |
| Cranston | 1754 | From Providence |
| Cumberland | 1747 | From Massachusetts; formerly called Attleboro Gore |
| East Greenwich | 1677 | Called Dedford 1686-1689 |
| East Providence | 1862 | From Massachusetts; originally Rehoboth then Seekonk |
| Exeter | 1743 | From North Kingstown |
| Foster | 1781 | From Scituate |
| Glocester | 1731 | From Providence |
| Hopkinton | 1757 | From Westerly |
| Jamestown | 1678 | Indian name Conanicut |
| Johnston | 1759 | From Providence |
| Lincoln | 1871 | From Smithfield |
| Little Compton | 1682 | From Massachusetts in 1747 |
| Middletown | 1743 | From Newport |
| Narragansett | 1901 | From South Kingstown |
| Newport | 1639 | Original Town |
| New Shoreham | 1661 | Admitted to Colony in 1664 as Block Island; Incorporated and name changed in 1672 |
| North Kingstown | 1641 | Incorporated as Kingstown in 1674; called Rochester 1686-1689; called North Kingstown after 1723 |
| North Providence | 1765 | From Providence |
| North Smithfield | 1871 | From Smithfield; called Slater for 16 days in 1871 |
| Pawtucket | 1862 | Part from Massachusetts in 1862; Part from North Providence in 1874 |
| Portsmouth | 1638 | Original town called Pocasset until 1639 |
| Providence | 1636 | Original town |
| Richmond | 1747 | From Charlestown |
| Scituate | 1731 | From Providence |
| Smithfield | 1731 | From Providence |
| South Kingston | 1723 | From Kingstown when divided into North and South |
| Tiverton | 1694 | From Massachusetts in 1747 |
| Warren | 1747 | From Massachusetts towns of Barrington, Swansea and Rehoboth; part from Bristol in 1873 |
| Warwick | 1643 | Original town; called Shawmet until 1648 |
| Westerly | 1669 | Called Haversham 1685-1689 |
| West Greenwich | 1741 | From East Greenwich |
| West Warwick | 1913 | From Warwick |
| Woonsocket | 1867 | From Cumberland in 1867; Part from Smithfield in 1871 |
References: Rhode Island Manual; Rhode Island Boundaries 1638-1936 (1936) J. H. Cady, History of Barrington (1898) T.W. Bicknell, Historical Data Relating to Counties, Cities and Town in Massachusetts (1975) F. Gueei