Sarah Benjamin Hagar was born 3 April 1663 in Watertown, Middlesex County, Massachusetts to John Benjamin (1620-1706) and Lydia Allen (1624-1709) and died 22 October 1745 Waltham, Middlesex County, Massachusetts of unspecified causes. She married William Hagar (1659-) 31 March 1687 in Watertown, Middlesex County, Massachusetts.
Children
| Name | Birth | Death | Joined with |
| Mary Hagar (1680-1770) | |||
| William Hagar (1684-1762) | |||
| Sarah Hagar (1691-1755) | |||
| John Hagar (1697-) | |||
| Ebenezer Hagar (1698-) | |||
| Joseph Jagar (1702-) | |||
| Mehitable Hagar (1704-1737) | |||
Siblings
| Name | Birth | Death | Joined with |
| John Benjamin (1651-1708) | |||
| Lydia Benjamin (1653-1692) | |||
| Abigail Benjamin (1655-1686) | |||
| Mary Benjamin (1658-) | |||
| Daniel Benjamin (1660-1719) | |||
| Ann Benjamin (1662-) | |||
| Sarah Benjamin (1663-1745) | 3 April 1663 Watertown, Middlesex County, Massachusetts | 22 October 1745 Waltham, Middlesex County, Massachusetts | William Hagar (1659-) |
| Abel Benjamin (1668-1720) | |||