On 23 Nov 1749 when Joseph was 26, he married Phebe Dorman (40083) , daughter of Benjamin Dorman (20536) (9 Aug 1699-) & Sarah Tuttle (8 Sep 1699-), in New Haven, CT.56 Born on 24 May 1731 in New Haven, CT.56 Phebe was baptized in First Congregational Society, New Haven, on 27 Jun 1731.55 Phebe died in Hamden, CT, on 19 Aug 1820; she was 89.6

Joseph Dorman and Phebe Dorman were second cousins as their grandfathers, Joseph and Benjamin Dorman, were brothers.