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Current, KOSU, logo, January 2015.jpg
CityStillwater, Oklahoma
Broadcast areaOklahoma City metropolitan area
SloganUniquely Oklahoma
Frequency91.7 MHz
Repeater(s)KOSN 107.5, Ketchum, Oklahoma
KOSR 88.3, Stillwater, Oklahoma
K235CG 94.9, Ponca City, Oklahoma
K297AQ 107.3, Bixby, Oklahoma
First air dateDecember 29, 1955
FormatNPR / news/talk / AAA
ERP100,000 watts
HAAT308 meters (1,010 ft)
Facility ID50220
Callsign meaningK Oklahoma State University
Former callsignsKAMC (1955-1958)
OwnerOklahoma State University
WebcastListen Live
Listen Live (HD2)

KOSU (91.7 FM) is a public radio station operated by Oklahoma State University, with studios on OSU's campus in Stillwater, Oklahoma and in the Film Row district in Oklahoma City, Oklahoma. The station broadcasts a mix of National Public Radio news, talk radio and adult album alternative (AAA) music format.

KOSU is one of several NPR member stations serving the Oklahoma City area, and the only NPR news and talk station to cover most of the market with its primary signal. The station's programming also airs on full-time satellites KOSN 107.5 FM in Ketchum, which serves the Tulsa area, KOSR 88.3 FM in Stillwater, K235CG 94.9 FM in Ponca City, and K297AQ 107.3 FM in Bixby.


KOSU began broadcasting on December 29, 1955 as KAMC, owned by what was then Oklahoma Agricultural & Mechanical College. It became KOSU in 1958, after A&M won university status.

It was a charter member of NPR in 1971. Shortly after joining NPR, the station built a new tower that provided the Oklahoma City and Tulsa suburbs with city-grade coverage and each city with grade B coverage. This was possible because Stillwater is roughly halfway between Oklahoma City and Tulsa. It moved to a new 1,000-foot tower west of Stillwater in 1991.

In September 2004, KOSU moved to a new 1,100-foot tower near Guthrie that gave it primary coverage of Oklahoma City. Previously, NPR news and talk had gotten spotty reception in much of the area since KCSC went all-classical in 1996. The University of Oklahoma's NPR outlet, KGOU, needed a second full-power station, KROU, to cover a large portion of Oklahoma City, and even then this left much of central Oklahoma without a clear signal for NPR news programming until KOSU activated its new tower.

KOSU also added improved service to northeastern Oklahoma with the purchase of commercial station KGND in Ketchum in September 2004 by Public Radio Capital, which entered an LMA with Oklahoma State University to simulcast the KOSU signal. On the same day KOSU moved to its new tower, KGND changed its calls to KOSN.

In March 2006, KOSU added two new translators in the Tulsa area, at 101.9 FM in Okmulgee (owned by PRC) and 107.3 FM in Bixby (owned directly by OSU). In 2011, KOSU added a new station on KOSR 88.3 FM in Stillwater.

On August 20, 2012, KOSU unveiled a new tag line, "Uniquely Oklahoma", and implemented changes in their daily schedule with new news/talk and music programs. At the core of the changes was a content partnership with "The Spy", which can be heard on weeknights and sporadically on the weekends on KOSU.[1]

In February 2013, Oklahoma State University received a $150-thousand grant from the Ethics and Excellence in Journalism Foundation in support of a new broadcast facility for KOSU. In September 2013, KOSU's Oklahoma City studios opened in the Hart Building in the historic Film Exchange District (Film Row). The new studios include a digital newsroom and a public performance studio that can accommodate up to 50 guests for concerts and community conversations. KOSU now originates live broadcasts from the downtown Oklahoma City studios as well as its original studios on the OSU campus.

In June 2014, KOSU announced that it would be joining the Clinton Global Initiative Project to Preserve American Indian Languages. "KOSU is committing its facilities and expertise during the next year to produce 250 book narrations in five indigenous languages."[2]


Call sign Frequency City of license State Power
m (ft)
Class FCC info
KOSN 107.5 FM Ketchum Oklahoma 100,000 299 m (981 ft) C1 FCC
KOSR 88.3 FM Stillwater Oklahoma 1,200 33.5 m (110 ft) A FCC
Call sign Frequency
City of license ERP
Class FCC info
K235CG 94.9 Ponca City, Oklahoma 250 D FCC
K297AQ 107.3 Bixby, Oklahoma 95 D FCC


  1. ^ 'KOSU Teams up with The Spy' Archived 2012-08-26 at the Wayback Machine (KOSU.org, 08/13/2012)
  2. ^ Burley, Kelly (2014-06-25). "KOSU Joins Clinton Global Initiative Project to Preserve American Indian Languages". KOSU. Retrieved 2014-06-28.

External links[edit]

Coordinates: 35°32′58″N 97°29′50″W / 35.5495°N 97.4972°W / 35.5495; -97.4972