The church has/had a graveyard.
St. Mary's Churchyard, once '...the borough's biggest burial ground' had become derelict after the bombing of the church in 1940. In Sep 1961 it was opened as a Garden of Rest by the Bishop of Liverpool. Some details of what became the graves there are given in the volume 'Bootle: newscuttings, 1958 - 1970', volume 3, Liverpool Record Office Local Studies Collection reference4 Hq 942.729 BOO.