• Pensby was a township in Woodchurch Parish, Wirral Hundred (SJ 2683), which became a civil parish in 1866.
• Since 1974 it has been part of the county of Merseyside.
• Including the hamlets of Arno Hill and Lingdale.
• The population was 22 in 1801, 41 in 1851, 48 in 1901, and 2996 in 1951.

CHURCHES AND CHAPELS

• Woodchurch, Holy Cross (C of E). The ancient parish church for Pensby.
• Barnston, Christ Church (C of E). The parish church since 1880.
• Pensby, St. Michael and All Angels (C of E). Founded 1958 as a chapel to Barnston. Registers of Baptisms from 1958 and Marriages from 1964 are held at the church.

LOCAL GOVERNMENT DISTRICTS

• Wirral Rural Sanitary District (1875–94)
• Wirral Rural District (1894–1933)
• Wirral Urban District (1933–74)
• Wirral Metropolitan Borough (1974+)

ELECTORAL DISTRICTS

• South Cheshire (1832–67)
• West Cheshire (1868–85)
• Wirral (1885–1974)

POOR-LAW UNIONS

• Wirral

REGISTRATION DISTRICTS

• Wirral (1837–1974)
• Birkenhead (1974–98)
• Wirral (1998+)