Joel married Julia Frances Tobey on 11 Jul 1871 in Lynn, Essex, Massachusetts, USA. Julia (daughter of Henry Tobey and Nancy Bartlett Durant) was born on 13 Oct 1848 in Falmouth, Barnstable, Massachusetts, USA; died on 12 Nov 1928 in Cambridge, Middlesex, Massachuaetts, USA; was buried in Oak Grove Cemetery, Falmouth, Barnstable, Massachusetts, USA. [Group Sheet] [Family Chart]

1. Arthur Middleton Cobb was born on 5 Oct 1871 in Lynn, Essex, Massachusetts, USA; died on 3 Apr 1941 in Boston, Suffolk, Massachusetts, USA.
2. Orman Fay Cobb was born on 18 Mar 1876 in Lynn, Essex, Massachusetts, USA; died on 22 Aug 1915 in Rutland, Worcester, Massachusetts, USA; was buried in Oak Grove Cemetery, Gardiner, Kennebec, Maine, USA.
3. Frances Durant Cobb was born on 30 Jan 1878 in Portland, Cumberland, Maine, USA; died on 8 Dec 1960.