Francis Asbury Wallar (August 15, 1840 – April 30, 1911) was a corporal in the 6th Wisconsin Volunteer Infantry Regiment of the Union Army who received the Medal of Honor.
On July 1, 1863, while participating in the Battle of Gettysburg, he engaged a Confederate soldier in single combat, capturing him and seizing his battle flag.Following the war he became Sheriff of Vernon County, Wisconsin.
Wallar died in 1911 and was buried in Walnut Mound Cemetery in Retreat, Wisconsin.
A plaque commemorating Wallar was installed at the cemetery in Retreat in 1961.