He is married to Lucy CRAM.
They got married on March 28, 1820 at Lyndeborough, Hillsborough, New Hampshire, he was 22 years old.Source 19
http://trees.ancestry.com/pt/AMTCitationRedir.aspx?tid=114784053&pid=1744
Joseph Grant<br>Gender: Male<br>Birth: 1795 - <Roxbury,Washington,VT><br>Marriage: Spouse: Lucy Cram - Mar 28 1820<br>Death: Oct 1873 - Minnesota, USA<br>Wife: Lucy Grant (born Cram)