It consisted initially of the part of the City of St. Catharines bounded on the east by the eastern city limit, and on the north, west and south by a line drawn from the city limit southwest along Eastchester Avenue, south along Bunting Road, southwest along Rockwood Street, south along Hartzell Road, northwest along the Canadian National Railway (CNR) line, south along Glengarry Road, east along Glendale Avenue, south along Mountain Street and east along Bradley Street to the city limit.

In 1976, it was redefined to consist of the part of the City of St. Catharines lying north of the Canadian National Railway.

In 1987, it was redefined to consist of the part of the City of St. Catharines lying north of a line drawn from west to east along St. Paul Street West, St. Paul Street West to St. Paul Crescent, the old Welland Canal, Carter Creek, the first Canadian National Railway spur line and the main CNR line and Queenston Street.

In 1996, it was redefined to consist of the part of the City of St. Catharines lying north and east of a line drawn from the western city limit along St. Paul Street West, St. Paul Crescent, the Old Welland Canal, Carter Creek, the first Canadian National Railway spur line, the most easterly Canadian National Railway spur line and the yard line to the southern city limit.

According to the 2021 Canadian census[3] Ethnic groups: 80.7% White, 4.2% Black, 3.5% Indigenous, 2.4% Latin American, 2.2% South Asian, 1.4% Filipino, 1.3% Chinese, 1.2% Arab Languages: 79.9% English, 2.1% Spanish, 1.8% French, 1.4% Italian, 1.3% German, 1.2% Arabic, 1.1% Polish Religions: 58.3% Christian (25.7% Catholic, 6.1% Anglican, 4.2% United Church, 1.9% Presbyterian, 1.3% Anabaptist, 1.3% Christian Orthodox, 1.2% Baptist, 1.1% Lutheran, 1.1% Pentecostal, 14.4% Other), 3.1% Muslim, 36.2% None Median income: $37,600 (2020) Average income: $46,760 (2020) Riding associations are the local branches of the national political parties: This riding has elected the following members of the House of Commons of Canada: