Ezra Hounsfield Riley (June 5, 1866 – January 5, 1937) was a Canadian politician and rancher in Alberta, Canada.

After serving a year into his second term he resigned his seat to protest the leadership of Arthur Sifton who became leader of the Liberal party in the wake of the Alberta and Great Waterways Railway scandal.

I am not afraid of the people and I could not continue to sit in the house at Edmonton without giving the people a chance to express themselves.On election day Riley was defeated by 100 votes in a hotly and bitterly contested by-election rife with accusations of tampered voters lists.

[3][4] His brother Harold Riley would end up winning the district for the Conservatives in another by-election almost exactly a year later.

Riley Park in Calgary, Alberta, the site of which was on his former ranch is named in his honor.