| Paul X. Williams | |
| Office: | Senior Judge of the United States District Court for the Western District of Arkansas |
| Term Start: | October 31, 1981 |
| Term End: | January 24, 1994 |
| Office1: | Chief Judge of the United States District Court for the Western District of Arkansas |
| Term Start1: | 1973 |
| Term End1: | 1981 |
| Predecessor1: | Oren Harris |
| Successor1: | Hugh Franklin Waters |
| Office2: | Judge of the United States District Court for the Western District of Arkansas |
| Term Start2: | June 12, 1967 |
| Term End2: | October 31, 1981 |
| Appointer2: | Lyndon B. Johnson |
| Predecessor2: | John E. Miller |
| Successor2: | Hugh Franklin Waters |
| Birth Name: | Paul Xandros Williams |
| Birth Date: | 19 February 1908 |
| Birth Place: | Booneville, Arkansas |
| Death Place: | Booneville, Arkansas |
| Education: | University of Arkansas (B.A.) University of Arkansas School of Law (LL.B.) |
Paul Xandros Williams (February 19, 1908 – January 24, 1994) was a United States district judge of the United States District Court for the Western District of Arkansas.
Born in Booneville, Arkansas, Williams received a Bachelor of Arts degree from the University of Arkansas in 1929 and a Bachelor of Laws from the University of Arkansas School of Law in 1930. He was in the United States Navy as a Lieutenant Commander from 1942 to 1946. He was an Assistant United States Attorney of the Western District of Arkansas from 1947 to 1948. He was a Chancellor of the Chancery Court of Arkansas from 1949 to 1967.
Williams was nominated by President Lyndon B. Johnson on May 24, 1967, to a seat on the United States District Court for the Western District of Arkansas vacated by Judge John E. Miller. He was confirmed by the United States Senate on June 12, 1967, and received his commission the same day. He served as Chief Judge from 1973 to 1981. He assumed senior status on October 31, 1981. Williams served in that capacity until his death on January 24, 1994, in Booneville.