| Spouse | Ann Garnett (1720 - ) |
| Child | Sarah Foster (1743 - 1830) |
| Child | Nancy Ann Foster (1745 - 1833) |
| Child | Phoebe Faster (1748 - 1830) |
| Child | Mary Foster (1748 - 1833) |
| Child | Thomas Foster Jr (1750 - 1811) |
| Child | Frances Foster (1752 - 1833) |
| Child | Mary Foster (1753 - ) |
| Child | Phoebe Foster (1754 - 1827) |
| Child | Elizabeth Foster (1756 - 1848) |
| Child | Anthony Foster (1756 - 1854) |
| Child | Francis Foster (1758 - ) |
| Child | Lucy Foster (1760 - ) |
| Child | John Foster (1761 - 1824) |
| Child | Elizabeth Foster (1762 - ) |
| Child | Mildred Foster (1763 - 1855) |
| Child | Phoebe Foster (1766 - ) |
| Child | Mary Foster (1768 - ) |
| Child | Nancy Foster (1770 - ) |
| Child | Sarah Foster (1772 - ) |
| Child | Mildred Foster (1774 - ) |