Obadiah Coolidge II was born 27 August 1695 in Watertown, Middlesex County, Massachusetts to Obadiah Coolidge (1663-1706) and Elizabeth Ross-Roose (1668-1732) and died 1741 Watertown, Middlesex County, Massachusetts of unspecified causes. He married Rachel Goddard (1699-1740) 24 July 1717 in Watertown, Middlesex County, Massachusetts.
Children
| Name | Birth | Death | Joined with |
| Josiah Coolidge (1718-1780) | 17 July 1718 Watertown, Middlesex County, Massachusetts | 25 December 1780 Lancaster, Worcester County, Massachusetts | Mary Jones (1720-1756) |
| Hannah Coolidge (1720-) | |||
| Lydia Coolidge (1723-) | |||
| Obadiah Coolidge (1728-1767) | |||
| Isaiah Coolidge (1733-1772) | |||
| Rachel Coolidge (1737-1766) | |||
Siblings
| Name | Birth | Death | Joined with |
| Elizabeth Coolidge (c1690-) | |||
| Joseph Coolidge (c1691-) | |||
| Hannah Coolidge (c1693-) | |||
| Obadiah Coolidge (1695-1741) | 27 August 1695 Watertown, Middlesex County, Massachusetts | 1741 Watertown, Middlesex County, Massachusetts | Rachel Goddard (1699-1740) |
| Sarah Coolidge (1696-) | |||
| Abigail Coolidge (1698-) | |||
| Mary Coolidge ((c1700-) | |||
| Lydia Coolidge (1702-1730) | |||
| Simon Coolidge (c1704-) | |||
| Stephen Coolidge (1705-) | |||