John A. Mercer (born January 21, 1957) is an American politician and attorney in the state of Montana.
[1][2] He is the longest serving Speaker of the House of Montana in state history.
After serving as chairman of the Montana Board of Regents, Mercer ended a considerable career in public service.
May 10, 2024 Governor Greg Gianforte appointed John A. Mercer to serve on the Twentieth Judicial District Court, which includes Lake and Sanders Counties.
Mercer filled the vacancy created by Twentieth Judicial District Judge Deborah Kim Christopher’s retirement.