Walter married Mary Elizabeth Pringle on 20 Oct 1874 in Elgin, Hastings County, Ontario, Canada. Mary (daughter of William Henry Pringle and Jerusha Matilda Roblin) was born on 4 Mar 1853; died on 24 Oct 1903 in Ontario, Canada; was buried in Saint Johns Anglican Cemetery, Bancroft, Hastings County, Ontario, Canada. [Group Sheet] [Family Chart]

1. Charles Walter Mullett was born on 7 Sep 1875 in Ontario, Canada.
2. Frank Mullett was born on 24 Jul 1877.
3. Mary Ethel Mullett was born on 1 Sep 1880.
4. Frederick Ira Mullett was born in 1883; died on 4 Jul 1899; was buried in Saint Johns Anglican Cemetery, Bancroft, Hastings County, Ontario, Canada.
5. John Robert Mullett was born on 9 Sep 1894 in Ontario, Canada; died on 10 Jul 1912 in Ontario, Canada; was buried in Saint Johns Anglican Cemetery, Bancroft, Hastings County, Ontario, Canada.