Gordon Alexander Thomas Bagier (7 July 1924 – 8 April 2012) was a British Labour Party politician.
Bagier was educated at Pendower Secondary Technical School (merged with neighbouring St Cuthbert's Grammar School to become its lower school in 1977) on Fox and Hounds Lane (off the A186) in Benwell, Newcastle upon Tyne.
He served in the Royal Marines from 1941 to 1945, as a gunner aboard the light cruiser HMS Belfast, and later played a part in her preservation.
At the 1964 general election, Bagier stood in the Sunderland South constituency, where he defeated the sitting Conservative Member of Parliament, Paul Williams.
He held the seat until his retirement at the 1987 general election, when his successor was the left-wing journalist Chris Mullin.