| Allen Sharp | |
| Office: | Senior Judge of the United States District Court for the Northern District of Indiana |
| Term Start: | November 1, 2007 |
| Term End: | July 10, 2009 |
| Office1: | Chief Judge of the United States District Court for the Northern District of Indiana |
| Term Start1: | 1981 |
| Term End1: | 1996 |
| Predecessor1: | Jesse E. Eschbach |
| Successor1: | William Charles Lee |
| Office2: | Judge of the United States District Court for the Northern District of Indiana |
| Term Start2: | October 11, 1973 |
| Term End2: | November 1, 2007 |
| Appointer2: | Richard Nixon |
| Predecessor2: | Robert A. Grant |
| Successor2: | Jon DeGuilio |
| Birth Name: | Allen Sharp |
| Birth Date: | 11 February 1932 |
| Birth Place: | Washington, D.C. |
| Death Place: | Granger, Indiana |
| Education: | Indiana State University (B.A.) Indiana University Maurer School of Law (J.D.) Butler University (M.A.) |
Allen Sharp (February 11, 1932 – July 9, 2009) was a United States district judge of the United States District Court for the Northern District of Indiana.
Born in Washington, D.C., and raised in the small town of Story Indiana, Sharp received a Bachelor of Arts degree from Indiana State University in 1953, a Juris Doctor from Indiana University Maurer School of Law in 1957, and later received a Master of Arts from Butler University in 1986. He was a United States Air Force Reserve Lieutenant Colonel from 1957 to 1984. He was in private practice of law in Williamsport, Indiana from 1957 to 1968. He was a judge of the Indiana Court of Appeals from 1969 to 1973.
On September 13, 1973, Sharp was nominated by President Richard Nixon to a seat on the United States District Court for the Northern District of Indiana vacated by Judge Robert A. Grant. Sharp was confirmed by the United States Senate on October 4, 1973, and received his commission on October 11, 1973. He served as Chief Judge from 1981 to 1996, and assumed senior status on November 1, 2007, and served in that capacity until his death on July 9, 2009, in Granger, Indiana.