Lumsden was a provincial electoral division for the Legislative Assembly of the province of Saskatchewan, Canada. The district was one of 25 created before the 1st Saskatchewan general election in 1905. It was the riding of Premier Thomas Walter Scott.
The Lumsden constituency was renamed "Regina County" between the 1908 election and the 1912 election. Redrawn to include the area of the abolished district of North Qu'Appelle in 1934, the constituency was renamed "Qu'Appelle". Redrawn and renamed again as "Qu'Appelle-Lumsden" in 1982, the riding was abolished before the 23rd Saskatchewan general election in 1995. It is now part of the Regina Qu'Appelle Valley, Lumsden-Morse, and Last Mountain-Touchwood constituencies.