Robert Jackson Gamble (February 7, 1851 – September 22, 1924) was an American politician who served as a U.S. Representative and Senator from South Dakota. He was the father of Ralph A. Gamble and brother of John Rankin Gamble, members of South Dakota's prominent Gamble family.
A Republican, he became a district attorney for the second judicial district of the Territory of Dakota in 1880, and was Yankton's city attorney in 1881 and 1882.[2] He served on the Territorial Council in 1885.[2] In 1894, he was elected to Seat B, one of South Dakota's two at-large seats in the U.S. House of Representatives, and he served in the Fifty-fourth Congress.[2] He ran unsuccessfully for reelection in 1896, but was again elected to Seat B in 1898, and served in the Fifty-sixth Congress.[2] During the Fifty-sixth Congress, he became the chairman of the U.S. House Committee on Expenditures on the Public Buildings.[3]
In 1915, Gamble moved to Sioux Falls and resumed the practice of law.[3] From 1916 to 1924, he served as a referee in bankruptcy for the southern district of South Dakota. He was a member of the National Executive Committee of the League to Enforce Peace.[3]
Gamble died in Sioux Falls on September 22, 1924, aged 73, and was buried at Yankton City Cemetery in Yankton.[3]