Walter Wyatt (July 20, 1893–February 26, 1978) was an American lawyer and the twelfth reporter of decisions of the United States Supreme Court from 1946 to 1963.

Born in Savannah, Georgia, he received his L.L.B. from the University of Virginia in 1917. During World War I, he was legal advisor to the Selective Service System. From 1922 to 1946, he was an attorney for the Federal Reserve System, ending his career there as general counsel. From 1936 to 1946, he was counsel to the Federal Open Market Committee.

He was appointed reporter on March 1, 1946, after the post had been vacant for two years. He retroactively edited the volumes of the United States Reports covering those two years, volumes 322 to 325.

Wyatt was also the author of several books on banking law. He died in Washington, D.C..