Judson Lincoln Newhall (March 26, 1870 – July 23, 1952) was a U.S. Representative from Kentucky.
Born in Hunterstown, Quebec, Canada, Newhall moved to Covington, Kentucky, with his parents in 1874. He attended the public schools and was graduated from Martin's Academy, Covington, Kentucky, in 1886. He attended the law department of Indiana University at Bloomington 1896-1898, and took special academic courses at the University of Cincinnati 1924-1926. He was employed in the United States Internal Revenue Service as a storekeeper-gauger from 1899 until his resignation in 1905 to engage in musical work. He served as director of music in the Covington public schools 1913-1917. During the First World War served as a secretary in the Y.M.C.A. welfare service. After the war he resumed his position with the Covington schools.
Newhall was elected as a Republican to the Seventy-first Congress (March 4, 1929-March 3, 1931). He was an unsuccessful candidate for reelection in 1930 to the Seventy-second Congress and for election in 1934 to the Seventy-fourth Congress. He engaged in the oil and gasoline business. He died in Park Hills, Covington, Kentucky, July 23, 1952. He was interred in Forest Lawn Cemetery, Erlanger, Kentucky.