The Tyumen constituency (No.185[a]) is a Russian legislative constituency in Tyumen Oblast.

The constituency covers parts of Tyumen as well as northern Tyumen Oblast.

Until 2007 the constituency was more compact, covering the entirety of Tyumen and small portion of western Tyumen Oblast, however, in 2016 the constituency was pushed to the north, grabbing sparsely populated areas of former Ishim constituency; half of Tyumen was placed into new Zavodoukovsk constituency.