| Kathryn Hoefer Vratil | |
| Office: | Senior Judge of the United States District Court for the District of Kansas |
| Term Start: | April 22, 2014 |
| Office1: | Chief Judge of the United States District Court for the District of Kansas |
| Term Start1: | 2008 |
| Term End1: | 2014 |
| Predecessor1: | John Watson Lungstrum |
| Successor1: | J. Thomas Marten |
| Office2: | Judge of the United States District Court for the District of Kansas |
| Term Start2: | October 9, 1992 |
| Term End2: | April 22, 2014 |
| Appointer2: | George H. W. Bush |
| Predecessor2: | Earl Eugene O'Connor |
| Successor2: | Holly Teeter |
| Birth Name: | Kathryn Louise Hoefer |
| Birth Date: | 21 April 1949 |
| Birth Place: | Manhattan, Kansas, U.S. |
| Education: | University of Kansas (BA, JD) |
Kathryn Hoefer Vratil (born April 21, 1949) is a senior United States district judge of the United States District Court for the District of Kansas.
Vratil was born in Manhattan, Kansas. She received a Bachelor of Arts degree from the University of Kansas in 1971 and a Juris Doctor from the University of Kansas School of Law in 1975. She was a law clerk for Judge Earl Eugene O'Connor of the United States District Court for the District of Kansas from 1975 to 1978. She was in private practice in Kansas City, Kansas from 1978 to 1992. She was a judge on the Municipal Court of the City of Prairie Village, Kansas from 1990 to 1992.
On July 28, 1992, Vratil was nominated by President George H. W. Bush to a seat on the United States District Court for the District of Kansas vacated by Earl Eugene O'Connor. She was confirmed by the United States Senate on October 8, 1992, and received her commission on October 9, 1992. She became chief judge in 2008 and served in that capacity until she assumed senior status on April 22, 2014.