Samuel Hugh Dillin (June 9, 1914 – March 13, 2006) was a United States federal judge.
Born in Petersburg, Indiana, Dillin received an A.B. from Indiana University in 1936 and an LL.B. from Indiana University in 1938. He was in private practice in Petersburg from 1938 to 1942. He was Secretary of the Public Service Commission of Indiana from 1942 to 1943. He served in the United States Army during World War II, from 1943 to 1946, achieving the rank of Captain, and thereafter returned to private practice in Petersburg from 1946 to 1961. Dillin was also an Indiana state representative in 1937, 1939, 1941, and 1951, and was an Indiana state senator from 1959 to 1961.
On September 14, 1961, Dillin was nominated by President John F. Kennedy to a new seat on the United States District Court for the Southern District of Indiana created by 75 Stat. 80. He was confirmed by the United States Senate on September 21, 1961, and received his commission on September 22, 1961. He served as chief judge from 1982 to 1984. He assumed senior status on March 31, 1993. Dillin served in that capacity until his death, in Cambridge, Massachusetts.