The Union Act provided that while many of the pre-existing electoral boundaries of Lower Canada and Upper Canada would continue to be used in the new Parliament, some electoral districts would be defined directly by the Union Act itself.[2] Leinster was one of those new electoral districts. The Union Act merged the previous electoral districts of the County of Lachenaie and the County of L’Assomption, to create a new district, called Leinster.[3]
The former districts of Lachenaie and l'Assomption had been defined by the 1829 boundaries as follows:
The following were the members of the Legislative Assembly for Leinster. The party affiliations are based on the biographies of individual members given by the National Assembly of Quebec, as well as votes in the Legislative Assembly. "Party" was a fluid concept, especially during the early years of the Province of Canada.[5][6][7]
This article incorporates text from this source, which is in the public domain: Statutes of Lower Canada, 13th Provincial Parliament, 2nd Session (1829), c. 74