Edward Lewis Sittler Jr. (April 21, 1908 – December 26, 1978) was a Republican member of the U.S. House of Representatives from Pennsylvania.
He became a became field underwriter for Mutual Life Insurance Company of New York in 1937.
He enlisted as a private in the United States Army in February 1943 and served in the Ordnance Corps in the European Theatre of World War II until released to the Inactive Reserve as a captain in August 1946.
In 1950, he was elected as a Republican to the 82nd United States Congress in the Pennsylvania 23rd district, defeating incumbent Democratic Congressman Anthony Cavalcante, but was an unsuccessful candidate for reelection in 1952 when re-districting forced him into an election against incumbent Democratic Congressman Thomas E. Morgan in the 26th district.
He served as Republican State committeeman for Fayette County, Pennsylvania from 1960 to 1972.