Mike Rosen is a self-described conservative political commentator and longtime host of The Mike Rosen Show, a political talk radio show on 850 KOA, broadcasting out of Denver, Colorado, where he holds the weekday 9 a.m.-12 p.m. time slot.

Rosen has filled in for Rush Limbaugh on The Rush Limbaugh Show on February 24 and 25, 2005.

The Governor of Colorado and the Mayor of Denver come on as guests to The Mike Rosen Show on a monthly basis to discuss current issues and to answer listeners' questions. Other prominent guests to have come on The Mike Rosen Show include John McCain and Condoleezza Rice.

Mike Rosen has appeared on the Talkers Magazine "Heavy Hundred" list of the most important U.S. radio talk show hosts. In 2009 Rosen appeared as number 82 on the list and in 2010 as number 86.

Starting March 6, 2009, Rosen writes a weekly column for The Denver Post. Prior to moving to The Denver Post, Rosen wrote a weekly column for the Rocky Mountain News until that newspaper's final issue in February 2009.

He is also contributing political commentary to other outlets, including RealClearPolitics.

Rosen was born in Brooklyn, New York, on December 5, 1944. He grew up in New York and has lived in Colorado for more than 30 years. He earned an MBA degree from the University of Denver and has worked as a corporate finance executive at Samsonite and Beatrice Foods. A veteran of the U.S. Army, Rosen served as Special Assistant for Financial Management to the Assistant Secretary of the Navy at The Pentagon. He is divorced and has two grown children.

On February 2, 2009 it was reported that Rosen had lost a "seven-figure sum" of his retirement savings from investing with Agile Group, a local investment firm that he had run ads for on the air. Rosen devoted the first full hour of his February 3, 2009 radio show to this topic.