Mary Bridget Ryan (née Carey; 31 January 1898 – 8 February 1981) was an Irish Fianna Fáil party politician and Teachta Dála (TD). She was a member of Cumann na mBan and a founder member of Fianna Fáil.
Ryan was first elected to the 12th Dáil in the 1944 general election for the Tipperary constituency. Her husband Martin Ryan was a TD for the same constituency from 1933 until his death in 1943. After boundary changes, she was returned to the 13th Dáil in the 1948 general election for Tipperary North, and re-elected in the 1951, 1954 and 1957 general elections.
At the 1961 general election, she lost her seat to Fine Gael's Thomas Dunne.