Simeon Penfield was born 2 August 1715 in Groton, New London County, Connecticut, United States to John Penfield (1683-1750) and Ann Cornwall (c1688-1779) and died 25 August 1794 East Hampton, Middlesex County, Connecticut, United States of unspecified causes. He married Mary Bowers (1728-1819) 6 December 1749 .
Children
| Name | Birth | Death | Joined with |
| Stephen Penfield (1750-1832) | |||
| Mary Penfield (1752-1831) | |||
| Simeon Penfield (1754-1844) | |||
| Amos Penfield (1756-1826) | |||
| Esther Penfield (1758-1826) | |||
| Abisha Penfield (1761-1846) | |||
| Hesibah Penfield (1764-1796) | |||
| Lydia Penfield (1770-1857) | |||
| Alice Penfield (c1770-1835) | |||
Siblings
| Name | Birth | Death | Joined with |
| Stephen Penfield (1713-1749) | 27 January 1713 Groton, New London County, Connecticut, United States | 12 September 1749 Chatham, Barnstable County, Massachusetts, United States | Jerusha Brewer |
| Simeon Penfield (1715-1794) | 2 August 1715 Groton, New London County, Connecticut, United States | 25 August 1794 East Hampton, Middlesex County, Connecticut, United States | Mary Bowers (1728-1819) |
| Jonathan Penfield (1719-1794) | 25 March 1719 Groton, New London County, Connecticut, United States | 23 July 1794 East Hampton, Middlesex County, Connecticut, United States | Elizabeth Shepard (1729-1803) |
| David Penfield (1722-1795) | |||
| Silence Penfield (1724-1792) | |||
| Hannah Penfield (1728-1797) | |||
| John Penfield (1731-1797) | |||