Joseph married Dr Flora Evelyn Colpitts 22 Jun 1927, New Haven, New Haven, Connecticut, United States. Flora (daughter of Andrew Weldon Colpitts and Flora Iona Oulton) was born 6 Apr 1901, Sackville, Westmorland, New Brunswick, Canada; died 20 May 1984, Seattle, King, Washington, United States; was buried , Acacia Memorial Park, Seattle, King, Washington, United States. [Group Sheet]

1. Dr Anna Colpitts Henderson
2. Elizabeth Bentley Henderson
3. William Weldon Henderson