Andrew Scott Sloan, or A. Scott Sloan (June 12, 1820 – April 8, 1895), was a United States Representative from Wisconsin and brother of fellow congressman Ithamar Conkey Sloan.
Born in Morrisville, New York, Sloan attended the public schools and Morrisville Academy. He studied law and was admitted to the bar in 1842 commencing practice in Morrisville, New York. He served as clerk of the Madison County Court from 1847 to 1849. Sloan moved to Wisconsin in 1854 and settled in Beaver Dam, Wisconsin, where he continued the practice of law. He served as member of the Wisconsin State Assembly in 1857. He served as mayor of Beaver Dam in 1857, 1858, and again in 1879. He was appointed in 1858 as judge of the Wisconsin Circuit Court for the third district.
Sloan was elected as a Republican to the Thirty-seventh Congress (March 4, 1861 – March 3, 1863) as the representative of Wisconsin's 3rd congressional district. He was not a candidate for renomination in 1862 and afterwards resumed the practice of law. He was an unsuccessful candidate of the Union Party for election in 1864 to the Thirty-ninth Congress. He served as clerk of the United States District Court for Wisconsin from 1864 till 1866. He served as judge of the Dodge County Court from 1868 to 1874. He was also Attorney general of Wisconsin from 1874 to 1878. He served as judge of the circuit court for the thirteenth judicial district from January 1882 until his death. He died in Beaver Dam, on April 8, 1895. He was interred in Oakwood Cemetery.
His son, Henry Clay Sloan, was also a member of the Wisconsin State Assembly.