John William Dennis

John William Dennis (16 May 1865 – 4 August 1949) was a British politician. He was Mayor of Westminster in 1907-08, when he was described as Liberal Unionist. He was a Conservative Party Member of Parliament (MP) from 1918 to 1922 for the constituency of Birmingham Deritend. He was the first MP to represent the newly created seat.

He was elected in the 1918 general election but only served for a single term being replaced by fellow Conservative Smedley Crooke at 1922 General Election.