It was initially defined as consisting of the town and township of Niagara, the city of St. Catharines, the townships of Grantham, Clinton and Louth, and the villages of Beamsville, Merritton and Port Dalhousie.
In 1892, the townships of Pelham and Gainsborough were added to the riding. The townships were transferred from the defunct electoral district of Monck
The electoral district was abolished in 1903 when it was redistributed between Lincoln and Welland ridings.