Abigail Post was born 1 April 1733 in Norwich, New London County, Connecticut, United States to Nathaniel Post (1702-1799) and Abigail Birchard (1704-1733) and died 1774 Brandon, Rutland County, Vermont, United States of unspecified causes. She married Charles Avery (1730-1774) 5 April 1750 in Norwich, New London County, Connecticut, United States.
Children
| Name | Birth | Death | Joined with |
| Hannah Avery (1751-1755) | |||
| John Avery (1752-1791) | |||
| Stephen Avery (1756-1838) | |||
| Abigail Avery (1758-) | |||
| Simeon Avery (1759-1803) | 17 September 1759 Norwich, New London County, Connecticut, United States | 16 January 1803 Brandon, Rutland County, Vermont, United States | Sarah Bump (1764-1856) |
| Hannah Avery (1761-1847) | |||
| Samuel Avery (1763-) | |||
| Elizabeth Avery (1764-1804) | |||
| Ruth Avery (1766-) | |||
| Daniel Avery (1768-1851) | |||
| Elijah Avery (1770-) | |||
| Jesse Avery (1772-1773) | |||
Siblings
| Name | Birth | Death | Joined with |
| Jabez Post (1726-1726) | |||
| John Post (1728-1809) | |||
| Jabez Post (1730-1775) | 5 August 1730 Norwich, New London County, Connecticut, United States | December 1775 Norwich, New London County, Connecticut, United States | Martha Hyde (1734-1760) Lucy Hyde (1739-1810) |
| Abigail Post (1733-1774) | 1 April 1733 Norwich, New London County, Connecticut, United States | 1774 Brandon, Rutland County, Vermont, United States | Charles Avery (1730-1774) |
| Name | Birth | Death | Joined with |
| Lucy Post (1737-) | |||