John Albert Carroll (July 30, 1901 - August 31, 1983) was a Democratic United States Representative and United States Senator from Colorado. Born in Denver, he attended the public schools, and during the First World War served in the United States Army (1918-1919). He graduated from Westminster Law School in Denver in 1929, and was admitted to the bar the same year and commenced practice in Denver. In 1933 and 1934, he was assistant United States attorney, and was district attorney of Denver from 1937 to 1941. He was regional attorney for the Office of Price Administration in 1942 and 1943, and served in the Second World War as a commissioned officer in the U.S. Army from 1943 to 1945. He resumed the practice of law, and was elected as a Democratic representative to the Eightieth and Eighty-first Congresses (January 3, 1947 to January 3, 1951).
Carroll was not a candidate for renomination in 1950 but was an unsuccessful candidate for election as a Democrat to the United States Senate in 1950 and again in 1954. He was special assistant to President Harry Truman in 1951 and 1952, and was elected as a Democrat to the United States Senate in 1956 and served from January 3, 1957 to January 3, 1963. He was an unsuccessful candidate for reelection in 1962, and was a resident of Denver until his death. Interment was at Ft. Logan National Cemetery, Denver.