Ambrose James Moriarty (9 August 1870 – 3 June 1949) was an English prelate of the Roman Catholic Church. He served as the Bishop of Shrewsbury from 1934 to 1949. Samuel Webster Allen, his predecessor as fourth bishop, was his uncle. In Shrewsbury public life he was a member of the Shrewsbury from 1898, and later Vice-Chairman of the Shrewsbury Education Committee which superseded the board in 1902. He was until his death member of the Shrewsbury Free Library Committee and the council of the Shropshire Archaeological Society.