Moose Jaw is the fourth largest city in Saskatchewan, Canada. Lying on the Moose Jaw River in the south-central part of the province, it is sit…Moose Jaw is the fourth largest city in Saskatchewan, Canada. Lying on the Moose Jaw River in the south-central part of the province, it is situated on the Trans-Canada Highway, 77 km west of Regina. Residents of Moose Jaw are known as Moose Javians. The city is surrounded by the Rural Municipality of Moose Jaw No. 161.