| Elijah Allen Cox | |
| Office: | Senior Judge of the United States District Court for the Northern District of Mississippi |
| Term Start: | March 22, 1957 |
| Term End: | August 28, 1974 |
| Office1: | Judge of the United States District Court for the Northern District of Mississippi |
| Term Start1: | March 2, 1929 |
| Term End1: | March 22, 1957 |
| Appointer1: | Calvin Coolidge |
| Predecessor1: | Seat established by 45 Stat. 1422 |
| Successor1: | Claude Feemster Clayton |
| Birth Name: | Elijah Allen Cox |
| Birth Date: | 16 February 1887 |
| Birth Place: | Baldwyn, Mississippi |
| Death Place: | Aberdeen, Mississippi |
| Spouse: | Louise Norvell Jones (married 1919) |
| Mother: | Forest Allen |
| Father: | William M. Cox |
| Education: | Vanderbilt University (B.A.) read law |
Elijah Allen Cox or Allen Cox (February 16, 1887 – August 28, 1974) was a United States district judge of the United States District Court for the Northern District of Mississippi.
Cox was born in Baldwyn, Mississippi. He attended McTyeire School in McKenzie, Tennessee and received a Bachelor of Arts degree from Vanderbilt University in 1909.[1] He read law in 1911 to enter the bar. He was in private practice in Baldwyn from 1911 to 1924, interrupted by service in the United States Army during World War I. In the summer of 1917, he went to Officer Training Camp at Fort Logan H. Roots, Arkansas.[2] He was a Chancellor of the First Chancery Court of Mississippi from 1924 to 1929.
On March 1, 1929, Cox was nominated by President Calvin Coolidge to a new seat on the United States District Court for the Northern District of Mississippi created by 45 Stat. 1422. He was confirmed by the United States Senate on March 2, 1929, and received his commission the same day. He assumed senior status on March 22, 1957, and served in that capacity until his death on August 28, 1974.
He was buried at Baldwyn Masonic Cemetery, Baldwyn, Mississippi.