Benedict Arnold, III was born 28 August 1683 in Newport, Newport County, Rhode Island, United States to Benedict Arnold (1642-1727) and Mary Turner (1650-1690) and died 1761 Norwich, New London County, Connecticut, United States of unspecified causes. He married Hannah Waterman (1708-1759) 8 November 1733 in Norwich, New London County, Connecticut, United States.
Children
| Name | Birth | Death | Joined with |
| Benedict Arnold (1738-1739) | |||
| Benedict Arnold (1741-1801) | 14 January 1741 Norwich, New London County, Connecticut, United States | 14 June 1801 London, Greater London, England, United Kingdom | Margaret Mansfield (1745-1775) Margaret Shippen (1760-1804) |
| Hannah Arnold (1742-1803) | |||
| Mary Arnold (1745-1753) | |||
| Absolom Arnold (1747-1750) | |||
| Elizabeth Arnold (1749-1755) | |||
Siblings
| Name | Birth | Death | Joined with |
| Benedict Arnold (1670-c1672) | |||
| Godsgift Arnold (1670-) | |||
| Mariky Arnold (c1671-) | |||
| Godsgift Arnold (1672-) | |||
| Sion Arnold (1674-1753) | |||
| Mary Arnold (1678-) | |||
| Content Arnold (1681-) | |||
| Benedict Arnold (1683-1761) | 28 August 1683 Newport, Newport County, Rhode Island, United States | 1761 Norwich, New London County, Connecticut, United States | Hannah Waterman (1708-1759) |
| Caleb Arnold (1685-1700) | |||
| John Arnold (1686-1688) | |||
| Name | Birth | Death | Joined with |
| Comfort Arnold (1695-1697) | |||
| Ann Arnold (1696-1760) | |||
| Sarah Arnold (1698-1718) | |||
| William Arnold (1701-1701) | |||