Doctor John Baker was born 22 December 1783 in Princeton, Worcester County, Massachusetts to Joseph Baker (1755-1850) and Lavina Keyes (1765-1859) and died 31 August 1848 Marlborough, Middlesex County, Massachusetts of unspecified causes. He married Martha Dennis (1786-1857) 6 February 1810 in Hancock, Hillsborough County, New Hampshire.
Children
| Name | Birth | Death | Joined with |
| Caroline Baker (1810-1839) | |||
| Martha Adeline Baker (1811-1904) | |||
| Harriet Newell Baker (1813-1888) | |||
| Lavinia Baker (1815-1907) | 30 December 1815 Marlborough, Middlesex County, Massachusetts, United States | 26 February 1907 Marlborough, Middlesex County, Massachusetts, United States | William Pitt Brigham (1811-1884) |
| John Dennis Baker (1818-1836) | |||
| Mary Ann Baker (1820-) | |||
| Darwen Baker (1822-1838) | |||
| Sullivan Dana Baker (1824-1908) | |||
| William Baker (1826-) | |||
Siblings
| Name | Birth | Death | Joined with |
| John Baker (1783-1848) | 22 December 1783 Princeton, Worcester County, Massachusetts | 31 August 1848 Marlborough, Middlesex County, Massachusetts | Martha Dennis (1786-1857) |
| Joseph Baker (1789-1885) | |||
| Levinah Baker (1796-1800) | |||
| Levinia Baker (1801-1900) | |||
| Bennet Baker (1803-) | |||