Obediah Morse, Jr was born 20 March 1732 in Sherborn, Middlesex County, Massachusetts to Obadiah Morse (1704-1753) and Mercy Walker (1708-1770) and died 7 January 1800 Sherborn, Middlesex County, Massachusetts of unspecified causes. He married Grace Fairbanks (1734-1772) 10 July 1755 in Sherborn, Middlesex County, Massachusetts.
Children
| Name | Birth | Death | Joined with |
| Mercy Morse (1756-1845) | |||
| Hannah Morse (1757-1845) | |||
| Adam Morse (1759-1779) | |||
| Levi Morse (1761-1814) | |||
| Grace Fairbanks Morse (1763-1855) | 16 March 1763 Sherborn, Middlesex County, Massachusetts | 15 March 1855 | Reuben Esty (1760-1797) |
| Obediah Morse (1765-) | |||
| Mary Morse (1768-1837) | |||
| Samuel Morse (1770-) | |||
| Persis Morse (1772-1847) | |||
| Daniel Morse (1776-) | |||
| Judith Morse (1778-1779) | |||
| Ezra Morse (1779-) | |||
| Anne Morse (1782-1800) | |||
| Moses Morse (1784-) | |||
| Asa Morse (1787-) | |||
| Pede Morse (1790-) | |||
Siblings
| Name | Birth | Death | Joined with |
| Daniel Morse (1729-1804) | |||
| Abner Morse (1731-1803) | |||
| Obediah Morse (1732-1800) | 20 March 1732 Sherborn, Middlesex County, Massachusetts | 7 January 1800 Sherborn, Middlesex County, Massachusetts | Grace Fairbanks (1734-1772) |
| Mercy Morse (1735-1794) | |||
| Benajah Morse (1737-1771) | |||
| Samuel Morse (1738-1798) | |||
| Sarah Morse (1741-1808) | |||
| John Morse (1743-1825) | |||
| Hannah Morse (1745-1822) | |||
| Mary Morse (1747-) | |||