Mark Hill Dunnell (July 2, 1823 – August 9, 1904) was a member of the U.S. House of Representatives from Minnesota from 1871 to 1883 and from 1889 to 1891.

He studied law, was admitted to the bar in 1856 and commenced practice in Portland, Maine, in 1860.

He entered the Union Army as colonel of the 5th Maine Volunteer Infantry Regiment, May 6, 1861, but mustered out on August 31, 1861.

He became a member of the Minnesota House of Representatives in 1867 and served as state superintendent of public instruction from April 2, 1867, to August 1870, when he resigned.

Dunnell died in Owatonna in 1904 and is buried in Forest Hill Cemetery.