Stephen Penfield was born 27 January 1713 in Groton, New London County, Connecticut, United States to John Penfield (1683-1750) and Ann Cornwall (c1688-1779) and died 12 September 1749 Chatham, Barnstable County, Massachusetts, United States of unspecified causes. He married Jerusha Brewer 13 June 1738 in Bristol, Bristol County, Rhode Island, United States.
Children
| Name | Birth | Death | Joined with |
| Samuel Penfield (1739-) | |||
| Jeremiah Penfield (1742-) | |||
| Benjamin Penfield (1744-c1786) | |||
| Jerusha Penfield (1746-) | |||
| John Penfield (1749-) | |||
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) | |||