[1] The Union Act provided that the town of Niagara would constitute one electoral district in the Legislative Assembly of the new Parliament,[2] but gave the Governor General of the Province of Canada the power to draw the boundaries for the electoral district.

[3] The first Governor General, Lord Sydenham, issued a proclamation shortly after the formation of the Province of Canada in early 1841, establishing the boundaries for the electoral district: Niagara was represented by one member in the Legislative Assembly.

Niagara electoral district was abolished on July 1, 1867, when the British North America Act, 1867 came into force, creating Canada and splitting the Province of Canada into Quebec and Ontario.

[8] It was succeeded by the electoral districts of Niagara in both the House of Commons of Canada[9] and the Legislative Assembly of Ontario.

[10] This article incorporates text from this source, which is in the public domain: Proclamation, Governor General Lord Sydenham, February 27, 1841.