He married Bridget Coddington . Bridget Coddington was christened at Metheringham, Lincoln, England 28 Apr 1751 daughter of John Coddington and Bridget .
They were the parents of 10
children:
Bridget Foster
christened 24 Jan 1776.
Sarah Foster
christened 28 Jun 1778.
Mary Foster
born 30 May 1780.
William Foster
born 30 May 1780.
Susanna Foster
christened 25 Dec 1783.
Thomas Foster
born 12 Aug 1785.
Elizabeth Foster
born 4 May 1787.
William Foster
born 21 Apr 1789.
Joseph Foster
born 16 Jun 1791.
John Foster
born 27 Jul 1794.