| Honorific-Prefix: | The Honorable |
| J. Mac Davis | |
| Office: | of the of |
| Term Start: | August 1, 2007 |
| Term End: | July 31, 2013 |
| Predecessor: | Kathryn W. Foster |
| Successor: | Randy R. Koschnick |
| Term Start1: | August 1, 1997 |
| Term End1: | July 31, 2015 |
| Predecessor1: | Clair H. Voss |
| Successor1: | Maria S. Lazar |
| Term Start2: | August 1, 1990 |
| Term End2: | July 31, 1996 |
| Predecessor2: | Robert T. McGraw |
| Successor2: | Patrick C. Haughney |
| State3: | Wisconsin |
| State Senate3: | Wisconsin |
| District3: | 11th |
| Term Start3: | January 3, 1983 |
| Term End3: | August 1, 1990 |
| Predecessor3: | Warren D. Braun |
| Successor3: | Joanne B. Huelsman |
| Birth Date: | 5 April 1952 |
| Residence: | Waukesha, Wisconsin |
| Children: | 3 |
| Party: | Republican |
J. Mac Davis (born April 5, 1952) is an American lawyer, politician, and retired judge. He served as a commissioner on the Wisconsin Ethics Commission, appointed to a five-year term in 2016. He was a Wisconsin Circuit Court judge in Waukesha County for 24 years, retiring in 2015. Earlier in his career he represented Waukesha County in the Wisconsin State Senate as a Republican.
Davis graduated from University of Wisconsin - Madison in 1973, with honors, in economics. He then received his J.D. degree, cum laude, from University of Michigan Law School. Davis was admitted to the bar in Wisconsin in 1976.
Davis was elected to the Wisconsin State Senate in 1982, as a Republican, and was re-elected in 1986. In the senate, he served as ranking senate minority member on the Joint Finance Committee.[1]
In 1990, Davis was elected a Wisconsin Circuit Court judge for Waukesha County.[2] He did not seek re-election in 1996, but unsuccessfully ran for congress. He was elected judge again in 1997, and re-elected in 2003 and 2009.[3] He served as chief judge of the 3rd Judicial District, by appointment of the Wisconsin Supreme Court, from 2007 to 2013. He retired from his judgeship on July 31, 2015.[4]
In September 2008, Judge Davis was nominated by U.S. President George W. Bush to the United States District Court for the Western District of Wisconsin, to replace Judge John C. Shabaz, who had stated his intention to retire.[5] The United States Senate did not take up his confirmation and the nomination expired four months later at the end of Bush's presidency.[6] [7]
He was appointed by Governor Scott Walker to the newly created Wisconsin Ethics Commission, to a five-year term commencing July 1, 2016.[8]