| William McKenna | |
| State1: | Missouri |
| State Senate1: | Missouri |
| District1: | 22nd |
| Term Start1: | April 7, 1993 |
| Term End1: | January 3, 1999 |
| Predecessor1: | Jay Nixon[1] |
| Successor1: | Steve Stoll[2] |
| State2: | Missouri |
| State House2: | Missouri |
| District2: | 102nd |
| Term Start2: | January 6, 1993 |
| Term End2: | April 7, 1993 |
| Predecessor2: | Joseph L. Treadway[3] |
| Successor2: | David W. Broach |
| State3: | Missouri |
| State House3: | Missouri |
| District3: | 105th |
| Term Start3: | January 5, 1983 |
| Term End3: | January 6, 1993 |
| Predecessor3: | Philip M. Barry[4] |
| Successor3: | Jo Ann Karll[5] |
| Birth Date: | 29 August 1946 |
| Party: | Democratic |
| Education: | Southeast Missouri State University |
William "Bill" McKenna (born August 29, 1946) is an American Democratic politician who served in the Missouri Senate and the Missouri House of Representatives from 1983 to 1993.
Born in St. Louis, Missouri, McKenna graduated from St. Louis University High School and earned a Bachelor of Arts degree in education from Southeast Missouri State University. He served in the United States Army Reserve from 1968 until 1974.[6]
His son Ryan McKenna also served in the Missouri Senate and the Missouri House of Representatives, while his father J. Glennon McKenna served in the Missouri House of Representatives in the 1940s.[7]