Alva Stewart (October 21, 1821 - December 31, 1889) was a member of the Wisconsin State Assembly and the Wisconsin State Senate.
Stewart was born on October 21, 1821, in Morrisonville, New York.
Stewart was a member of the Assembly in 1850.
From 1864 to 1889, Stewart was a Wisconsin Circuit Court judge.
He was a member of the Whig Party.