Benjamin Bemis was born 19 April 1725 in Watertown, Middlesex County, Massachusetts to Joseph Bemis (1684-1738) and Elizabeth Pierce (1687-1753) and died 7 March 1793 Cornish City, Sullivan County, New Hampshire, United States of unspecified causes. He married Sarah Garfield (1723-1797) 1 September 1748 in Waltham, Middlesex County, Massachusetts.
Children
| Name | Birth | Death | Joined with |
| Mary Bemis (1749-1818) | |||
| Catherine Bemis (1753-1820) | 29 August 1753 Sutton, Worcester County, Massachusetts, United States | 22 July 1820 Sutton, Worcester County, Massachusetts, United States | Thomas Harbach (1741-1821) |
| Tabitha Bemis (1754-1831) | |||
| Persis Bemis (1757-1795) | |||
| Benjamin Bowman Bemis (1763-1830) | |||
Siblings
| Name | Birth | Death | Joined with |
| Elizabeth Bemis (1707-1745) | |||
| Mary Bemis (1709-1738) | |||
| Sarah Bemis (1711-) | |||
| Susannah Bemis (1714-) | |||
| Dinah Bemis (1718-1802) | |||
| Abigail Bemis (1720-) | |||
| Joseph Bemis (1723-1800) | 10 April 1723 Watertown, Middlesex County, Massachusetts | 1800 Waltham, Middlesex County, Massachusetts | Ruth Simonds (1727-1800) |
| Benjamin Bemis (1725-1793) | 19 April 1725 Watertown, Middlesex County, Massachusetts | 7 March 1793 Cornish City, Sullivan County, New Hampshire, United States | Sarah Garfield (1723-1797) |
| Kezia Bemis (1726-1755) | |||