KOPN (89.5 FM) is a non-profit community radio station in Columbia, Missouri, United States, which from its start was modeled on the progressive format of KPFA in Berkeley, California.

It broadcast a monaural signal and operated out of a studio and office space shared with the Columbia Community Grocery, a natural food cooperative, on the second floor of 915 East Broadway.

[4] It broadcast from atop the newly opened 15-story Paquin Tower adjoining the University of Missouri campus and Columbia's second tallest building and highest above average terrain.

In 1979 it created the Midwest Radio Theatre project, partially funded by a modest National Endowment for the Arts Services to the Field grant.

Jim Jordan, the golden age radio star of "Fibber McGee and Molly" was the first guest host and keynote speaker.

Later it was incorporated as a separate 501(c)(3) non-profit named the National Audio Theatre Festival (NATF) the performance and training event was moved to West Plains, Missouri.

Two attempts were made to re-broadcast PTV signals, first from KETC, St Louis, with a series of microwave relay towers which was only marginally successful.

This move came after years of unsuccessful attempts by the university to get the FCC to either revoke or significantly modify KOPN's license to broadcast with 40 kW ERP at the Paquin Tower location.

It was one of only two stations in Missouri to carry the far right 5 minute daily program "This is Liberty Lobby" which concluded with an invitation to get the group's "America First" publication.

[9] In a wink to its progressive history the station on April Fools' Day in 1981 joked that it would cancel "Zebra Sunrise" which had been deemed moral trash by the Moral Majority and station would begin producing anti-Communist programs, have a 50 percent increase in religious programming and offer Paul Harvey, Phyllis Schlafly, William Buckley and Jerry Falwell as commentators and that "Liberty Lobby will be aired morning, noon and night.