Joseph Blackburn McGrew (28 January 1829 – 30 December 1897)[1] was a member of the Wisconsin State Assembly and the Wisconsin State Senate.
McGrew was born in Wayne Township, Jefferson County, Ohio.
He moved to Richland County, Wisconsin in 1855.
McGrew was a member of the Assembly in 1875 and of the Senate from 1880 to 1881.
Additionally, McGrew was Sheriff of Richland County in 1863.