John married Sarah Ann Lawrence on 18 Jul 1853 in St John's Church, Paddington, Middlesex, England. Sarah (daughter of John Lawrence and Rachel Parry) was born in 1824 in Dukes Lane, Kensington, Middlesex, England; was christened on 7 Mar 1824 in St Mary Abbots Church, Kensington, Middlesex, England; died in 1910 in Kensington, Middlesex, England. [Group Sheet]

1. John B. Flanagan was born in 1855 in Kensington, Middlesex, England; and died.
2. Margaret Mary Flanagan was born in 1857 in Kensington, Middlesex, England; and died.
3. James Flanagan was born in 1858 in Paddington, Middlesex, England; and died.
4. Thomas Flanagan was born in 1860 in Kensington, Middlesex, England; and died.