Platt Whitman (February 5, 1871 – 1935) was a member of the Wisconsin State Assembly and the Wisconsin State Senate.
Whitman was born in Dodgeville, Wisconsin. He graduated from the University of Wisconsin-Madison in 1893 and the University of Wisconsin Law School in 1895. Mr. Whitman is interred in the East Side Cemetery in Dodgeville near the Jones-Owens Mausoleum.
His father was Joel Whitman.
Whitman was elected to the Assembly in 1908. Later, he was a member of the Senate from the 17th district from 1915 to 1918. He was a Republican.