Mercy Walker Morse was born circa 1708 in Sherborn, Middlesex County, Massachusetts to William Walker (1666-1732) and Sarah Goodenow (1666-1733) and died 1770 Sherborn, Middlesex County, Massachusetts of unspecified causes. She married Obadiah Morse (1704-1753) 28 November 1728 in Sudbury, Middlesex County, Massachusetts.
Children
| 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-) | |||
Siblings
| Name | Birth | Death | Joined with |
| John Walker (1687-) | |||
| Thomas Walker (1789-1792) | |||
| Sarah Walker (1691-) | |||
| John Walker (1693-) | |||
| Abigail Walker (1702_) | |||
| Mary Walker (1706-1740) | |||
| Bathsheba Walker (1708-) | |||
| Mercy Walker (1708-1770) | 1708 Sherborn, Middlesex County, Massachusetts | 1770 Sherborn, Middlesex County, Massachusetts | Obadiah Morse (1704-1753) |
| Hezekiah Walker (1711-) | |||
| Bearshelm Walker | |||