Niagara Centre (renamed to Welland from 2006 to 2018) is a provincial electoral district in Ontario, Canada, represented from 1867 until 1977 and again since 2007 (under different boundaries) in the Legislative Assembly of Ontario. Its population in 2006 was 112,875.

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Niagara Centre

Ontario electoral district
Niagara Centre in relation to southern Ontario ridings
Provincial electoral district
Legislature	Legislative Assembly of Ontario
MPP	Jeff Burch New Democratic
District created	2006
First contested	2007
Last contested	2022
Demographics
Population (2016)	109,070
Electors (2018)	88,287
Area (km²)	490
Pop. density (per km²)	222.6
Census division(s)	Niagara
Census subdivision(s)	Welland, Thorold, Port Colborne, St. Catharines

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A new riding of Niagara Centre was created before the 1999 election from small parts of the Lincoln and St. Catharines—Brock ridings, and almost all of the Welland—Thorold riding. The current electoral district was created in 2003: 74.9% of the riding came from Niagara Centre riding, 22.5% from Erie—Lincoln and 2.7% from Niagara Falls riding. The name was changed to Welland during redistricting in 2006. In 2018, the name was changed back to Niagara Centre.

From 1967 to 1975, the southern part of the riding was covered by the Welland South district.

The pre-2018 Welland riding consisted of the cities of Welland, Thorold, Port Colborne, and the part of the City of St. Catharines lying south of a line drawn from the western city limit east along St. Paul Street West, northeast along St. Paul Crescent, east and south along Twelve Mile Creek, and east along Glendale Avenue to the eastern city limit.^[1]

Source: Legislative Assembly of Ontario^{[2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]}