Birkenhead St Mary is an Ecclesiastical Parish and a market town in the county of Cheshire, created in 1738 from a chapelry in Bidston Ancient Parish.
Parish registers begin:
- Parish registers: 1719
- Bishop’s Transcripts: 1813
Nonconformists include: Church of Jesus Christ of Latter-day Saints, Church of Scotland/Scottish Presbyterian, Presbyterian, Roman Catholic, Unitarian, Welsh Baptist, Welsh Independent, Welsh Presbyterian, and Wesleyan Methodist.
- Birkenhead Holy Trinity
- County: Cheshire
- Civil Registration District: Wirral
- Probate Court: Pre-1541 - Court of the Bishop of Lichfield (Episcopal Consistory), Post-1540 - Court of the Bishop of Chester (Episcopal Consistory)
- Diocese: Pre-1541 - Lichfield and Coventry, Post-1540 - Chester
- Rural Deanery: Wirral
- Poor Law Union: Wirral
- Hundred: Wirral
- Province: York