Kilgore entered politics at this time, and served as a member of the Texas House from 1947 to 1955, and was a delegate to the Democratic National Conventions in 1956, 1960, and 1968. The national exposure helped him get elected as a Democrat to the Eighty-fourth and to the four succeeding Congresses (January 3, 1955 to January 3, 1965). He was not a candidate for renomination in 1964 to the Eighty-ninth Congress. Instead, he resumed the practice of law, residing in Austin until his death there on February 10, 1999. He is interred in Austin at the Texas State Cemetery alongside his wife, Jane.
30° 15.939, -097° 43.636
Texas State Cemetery