Columbus' first television station began operations on April 3, 1949, as WLWC on channel 3. The station's original owner was the
Cincinnati-based
Crosley Broadcasting Corporation, a division of the
Avco Company. Crosley also owned
WLW radio and
WLWT television in Cincinnati, as well as WLWD television (now
WDTN) in
Dayton. Together these stations comprised the "WLW Television Network", a regional group of inter-connected stations. Until the mid-1960s, the stations emphasized their connection to each other within their on-air branding; the Columbus station was known as "WLW-C". The station's studios were originally located in the
Seneca Hotel in downtown Columbus before WLWC moved into their present facility on Olentangy River Road, five months after the station signed on. Like all of the WLW television stations in Ohio, WLWC was an NBC affiliate, though it carried some programming from the
DuMont network until WTVN-TV (now
WSYX) took the DuMont affiliation when that station launched in September 1949. In 1952, following the release of the
Federal Communications Commission (FCC)'s
Sixth Report and Order which ended the four-year freeze on station license awards, a VHF frequency realignment resulted in WLWC being forced to move to channel 4, trading channels with then-NBC-owned WNBK (now
WKYC) in
Cleveland; the switch took place in June 1953. The Crosley TV station group would later grow to include WLWA (now
WXIA-TV) in
Atlanta, WLWI (now
WTHR) in
Indianapolis, and
WOAI-TV in
San Antonio. Along with NBC programming, the Crosley stations in Ohio and Indianapolis also aired common programming, including
The Paul Dixon Show,
Midwestern Hayride,
The Ruth Lyons 50-50 Club (later to become
The Bob Braun Show),
The Phil Donahue Show, and telecasts of
Cincinnati Reds baseball; WLWC originated coverage of the
Ohio State Fair, which was also carried in Cincinnati and Dayton. The Crosley broadcast division took the name of its parent company in 1968, becoming Avco Broadcasting Corporation. In 1969, the FCC enacted its
"one-to-a-market" rule, which prohibited common ownership of AM radio and television stations with overlapping coverage areas under certain conditions while
grandfathering some already existing instances. Avco's ownership of WLWC, WLWT, WLWD, and WLW radio (a 50,000-
watt,
clear-channel station which can also be heard throughout much of eastern North America at night) was granted protection under the clause. But as a condition of maintaining three television stations with common coverage areas Crosley/Avco operated WLWC, WLWT, and WLWD with shorter transmission towers. In 1975, Avco announced the sale of its broadcasting outlets; channel 4 was sold in February 1976 to the
Providence, Rhode Island–based
Outlet Company, who then changed the station's call letters to the current WCMH-TV on the 3rd. The call letters were selected to match the
IATA airport code for what is now
John Glenn Columbus International Airport, "CMH". Base while covering a
breaking news story, as
Grant Lifeflight II's BK 117 N4493X sits nearby For many years, WLWC/WCMH-TV has shared NBC programming in the eastern part of the market with
WHIZ-TV (channel 18) in
Zanesville despite channel 4 itself covering Zanesville and covering weather reports as far east as
Cambridge (part of the
Wheeling, West Virginia–
Steubenville, Ohio market and served by
WTOV-TV for NBC) and all other major network affiliates in Columbus covering
Muskingum County as default affiliates, since Zanesville is considered a separate TV market from Columbus. WHIZ-TV would also serve somewhat as a buffer for WCMH-TV after
WTAE-TV in
Pittsburgh signed on in 1958 and had to "box in" its signal to protect then-WLWC and
three other stations also broadcasting on channel 4. Outlet merged with NBC in 1996, and channel 4 became an NBC
owned-and-operated station, spending much of the next decade as one of two stations in the market to hold this status; the other was
UPN's
WWHO, (channel 53, owned by that network's corporate parent
Viacom from 1997 to 2005). From 1996 to 1999, channel 4 was technically a sister station to Cleveland's WKYC through NBC's minority ownership of that station, though they had ceded operational control to
Gannett (now
Tegna Inc., which now also owns
WBNS-TV) by that point.
NBCUniversal placed WCMH-TV on the market January 9, 2006, along with sister stations
WJAR in Providence,
WVTM-TV in
Birmingham, Alabama, and
WNCN-TV in
Goldsboro, North Carolina.
Media General, the
Richmond, Virginia-based company which already owned five NBC affiliates in the southeastern United States, announced it would purchase the four stations on April 6, 2006; the sale was finalized on June 26, 2006. As a result, channel 4 became Media General's first station in the
Great Lakes region. For several months after the sale closed, WCMH's website and those of the other three stations remained in the format used by the websites of NBC-owned stations. In December 2006, WNCN and WJAR launched redesigned websites, which are no longer powered by
Internet Broadcasting. On December 11, 2006, WVTM's website followed suit, followed by WCMH on December 14. Media General has since located the
master control for all Media General NBC affiliates at its Columbus studios. In 2013, Media General migrated its television station web sites to
Worldnow (who provided video services to the company's in-house web site operations prior to the hosting deal). Following the company's takeover by the principal staff of LIN, the Media General station web sites are now hosted by WordPress.com. With subsequent sales and affiliation switches involving the other three stations NBC sold to Media General in 2006, WCMH was the last of the four that had had both the same owner and the same network affiliation that it had since 2006. (WJAR and WVTM were sold to Sinclair and
Hearst Television, respectively, in 2014, while WNCN switched its network affiliation from NBC to
CBS in 2016.) WCMH would be reunited with WDTN (the former WLWD) in 2014 when Media General purchased LIN Media, which also made WCMH a sister station to LIN's properties in
Youngstown (
CBS affiliate
WKBN-TV,
Fox affiliate
WYFX-LD, and
ABC-affiliated
SSA partner
WYTV) within Ohio, as well as WDTN's SSA partner
WBDT in
Springfield. On January 27, 2016,
Nexstar Broadcasting Group announced it would buy Media General for $4.6 billion. WCMH became part of "Nexstar Media Group". The deal closed on January 17, 2017. On August 19, 2025, Nexstar announced it would
acquire Tegna Inc. In Columbus, Tegna owns
WBNS,
WBNS-FM, and
WBNS-TV. The deal was completed on March 19, 2026. A
temporary restraining order issued one week later by the
U.S. District Court for the Eastern District of California, later escalated to a preliminary injunction, has prevented WBNS AM/FM/TV from being integrated into WCMH.
Ohio Attorney General Dave Yost reached a deal with Nexstar on April 30, 2026, under which, if the injunction were to be lifted, Nexstar would maintain the existing local program output and editorially independent news departments between WBNS and WCMH through 2030. == News operation ==