Bryan Michael Deece Cassidy (born 17 February 1934) is a retired businessman and Conservative Party politician.
Following a period of National Service as an officer in the Royal Artillery 1955-57, Cassidy held a commission in the Territorial Honourable Artillery Company until 1962. He was director of a number of companies.
He unsuccessfully contested Wandsworth Central at the 1966 general election. He was a member of the Greater London Council representing Hendon North from 1977 until the council's abolition in 1986.
He was a member of the European Parliament from 1984 to 1999, representing Dorset East and Hampshire West 1984-94, Dorset and East Devon 1994-99.