William married Margaret Holloway on 12 May 1849 in Grant County, Indiana, United States. Margaret (daughter of Jesse Holloway and Eleanor Hinshaw) was born on 6 Aug 1828 in Ohio, United States; died on 18 May 1914 in Illinois, United States; was buried after 18 May 1914 in Shelby County, Illinois, United States. [Group Sheet] [Family Chart]

1. Lewis W. Mills was born in 1850 in Ohio, United States; died on 4 Feb 1923 in Charleston, Coles, Illinois, United States; was buried in Mound Cemetery, Charleston, Coles, Illinois, United States.
2. Evaline D. Mills was born in 1852 in Indiana, United States; and died.
3. Silas P Mills was born in 1853 in Indiana, United States; and died.
4. Alpheus R. Mills was born in 1857 in Indiana, United States; and died.
5. Amos Ellsworth Mills was born in 1861 in Illinois, United States; died on 18 Apr 1929 in El Paso, El Paso, Texas, United States; was buried on 19 Apr 1929 in Evergreen Cemetery, El Paso, El Paso, Texas, United States.
6. Effie E Mills was born in Mar 1868 in Illinois, United States; and died.