Nathaniel Hinckley, Sr. was born 25 June 1738 in Harwich, Barnstable County, Massachusetts to Thomas Hinckley (1709-1769) and Ruth Merrick (1712-1765) and died 29 May 1790 Chatham, Barnstable County, Massachusetts of unspecified causes. He married Mercy Nickerson (1742-1821) 21 January 1761 in Chatham, Barnstable County, Massachusetts.
Children
| Name | Birth | Death | Joined with |
| Deborah Hinckley (1762-1841) | |||
| Isaac Hinckley (1767-1857) | |||
| Nathaniel Hinckley (1769-1849) | 12 July 1769 Harwich, Barnstable County, Massachusetts | 22 May 1849 Clinton County, New York | Rhoda Barber (1773-1859) |
| Mercy Hinckley (1770-1833) | |||
| Thomas Hinckley (1773-1814) | |||
| Rachel Hinckley (1776-1844) | |||
| Elijah Hinckley (1783-1846) | |||
Siblings
| Name | Birth | Death | Joined with |
| Seth Hinckley (1730-1797) | |||
| Thomas Hinckley (1731-1807) | |||
| Mary Hinckley (1737-1741) | |||
| Nathaniel Hinckley (1738-1790) | 25 June 1738 Harwich, Barnstable County, Massachusetts | 29 May 1790 Chatham, Barnstable County, Massachusetts | Mercy Nickerson (1742-1821) |
| Mary Hinckley (1741-) | |||
| Ruth Hinckley (1743-1822) | |||
| Mercy Hinckley (1745-1801) | |||
| Isaac Hinckley (1747-) | |||
| Elijah Hinkley (1749-) | |||
| Elizabeth Hinckley (1753-1847) | |||
| Ruth Hinckley (1757-) | |||