Moose Jaw County was a provincial electoral division for the Legislative Assembly of the province of Saskatchewan, Canada. The district was created as "Moose Jaw" before the 1st Saskatchewan general election in 1905. The riding was abolished into the districts of Gravelbourg, Bengough, Notukeu-Willow Bunch, and Milestone before the 9th Saskatchewan general election in 1938. It was the constituency of Premier Charles Avery Dunning.
It is now part of the Thunder Creek, Moose Jaw Wakamow, and Wood River constituencies.