It initially consisted of the county of Dufferin and that part of the county of Simcoe lying south of and including the townships of Tossorontio, Essa and Innisfil. In 1933, it was redefined to exclude the townships of East Luther and East Garafraxa in the county of Dufferin, and no part of the town of Barrie.
In 1947, it was defined as consisting of the county of Dufferin, including the town of Orangeville, but excluding the townships of East Luther and East Garafraxa, and the part of the county of Simcoe lying south of and including the townships of Tosorontio, Essa and Innisfil, and excluding the town of Barrie.
In 1952, it was defined as consisting of the county of Dufferin and the town of Orangeville, and the part of the county of Simcoe lying south of and including the townships of Tosorontio, Essa and Innisfil (excluding the town of Barrie).
The electoral district was abolished in 1966 when it was redistributed between Peel—Dufferin, Simcoe North, Wellington—Grey and York—Simcoe ridings.
|- |ROWE, William Earl |align="right"|8,942 |- |WOOD, Robert John |align="right"|5,936 |}
|- |ROWE, William Earl |align="right"|8,376 |- |O'FLYNN, Thomas Johnston |align="right"|5,303 |}
|- |ROWE, William Earl |align="right"|9,369 |- |CASE, Wilfred Garfield |align="right"| 4,388 |}
|- |ROWE, Hon. William Earl |align="right"|8,150 |- |BOAKE, William James Campbe |align="right"| 4,767 |- |FERRY, Allan Houghton |align="right"| 2,657 |}
On Mr. Rowe's resignation when he accepted nomination for the Ontario Legislature at general election, 28 September 1937: |- |ROWE, Hon. William Earl |align="right"|acclaimed |}
|- |ROWE, Hon. William Earl |align="right"|6,527 |- |GILMORE, Andrew Parr |align="right"|4,226 |}
|- |ROWE, Hon. William Earl |align="right"|8,539 |- |MACKINNON, Murdock Charles |align="right"|4,885 |}
|- |ROWE, Hon. William Earl |align="right"|7,639 |- |MCCULLOCH, Richard |align="right"|5,720 |}
|- |ROWE, William Earl |align="right"|9,248 |- |MCCULLOCH, Richard |align="right"|7,083 |}
|- |ROWE, W. Earl |align="right"|11,852 |- |WALES, Burns |align="right"|6,290 |}
|- |ROWE, W. Earl |align="right"|13,037 |- |BOWERMAN, John D. |align="right"| 5,750 |}
|- |ROWE, W. Earl |align="right"|10,533 |- |STEWART, Harvey R. |align="right"|7,526 |- |CUMMING, Lloyd G. |align="right"|1,547 |}
|- |MADILL, J. Ellwood |align="right"|10,278 |- |STEWART, Harvey |align="right"|8,941 |- |CUMMING, Lloyd G. |align="right"|1,626 |- |MANSON, Derrick |align="right"|673 |}
|- |MADILL, J. Ellwood |align="right"| 9,701 |- |STEWART, Harvey R. |align="right"|6,420 |- |HILL, George |align="right"|3,384 |- |CUMMING, Lloyd G. |align="right"|984 |}