In the 1891 census 19 Clayton Street, Throston, Durham. Head William Coates, age 45, iron moulder, born Gateshead, Durham. Wife Maryrah Coates, age 41, born Whitley, Northumberland. Son John V. [or U] Coates, single, age 22, iron dresser, born Gateshead. Son William Coates, single, age 18, machinist, born Gateshead. Daughter Elizabeth Coates, age 13, born Durham City. Son Thomas M. Coates, age 11, scholar, born Sunderland, Durham City. Son Charles B., scholar, born Sunderland, Durham City. Daughter Mary J. Coates, age 6, scholar, born Sunderland, Durham City. Daughter Isabella Coates, age 4, born Sunderland, Durham City. Daughter Annie Coates, age 2, born Hartlepool, Durham City. Son Matthew Coates, age 7 months, born Hartlepool.

In the 1901 census civil parish Throston, Ecclesiastical parish Holy Trinity, Hartlepool, Durham at 41 Lilly Street. Head, William Coates, widower, age 49, iron moulder, born Gateshead, Durham. Daughter Mary J. Coates, single, age 18, domestic servant, born, Sunderland, Durham. Daughter Annie Coates, age 14, born Hartlepool. Daughter Agnes Coates, age 4, born Hartlepool. Stepson Thomas Auckland, age 15, born Hartlepool. Stepdaughter Sarah Auckland, age 14, born Hartlepool. Stepson Robert Auckland, age 9, born Hartlepool.