Wallace Humphrey White Jr. (August 6, 1877 – March 31, 1952) was an American politician and Republican leader in the United States Congress from 1917 until 1949.

His grandfather, William P. Frye, was also a prominent political figure, having served as a Senator from Maine and President pro tempore.

White studied law and was admitted to the bar, afterward beginning to practice in Lewiston.

According to John Gunther's 1947 book Inside U.S.A., as the titular party floor leader, "his chief function is to hold the balance between two much more dominant and vivid men, Taft and Vandenberg...Everybody likes White; few people pay much attention to him."

White was one of a handful of senators who voted against the elevation of Hugo Black to the Supreme Court in 1937 based on his previous Klan membership.