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KOA
Broadcast area	Denver, Colorado
Branding	850 KOA
Frequency	850 (kHz)
First air date	December 15, 1924
Format	News/Talk
Power	50,000 watts
Class	A
Facility ID	29738
Transmitter Coordinates	39°30′23.6″N, 104°46′4″W
Callsign meaning	Klear Over America
Owner	Clear Channel Communications
Website	www.850koa.com

KOA (850 AM), ("NewsRadio 850 KOA") is a clear channel news/talk radio station serving the Denver, Colorado market. It is owned by Clear Channel Communications and is nicknamed "the Blowtorch of the West" for its 50,000 watt signal.

KOA was originally owned by General Electric and began broadcasting in 1924. They started with 5,000 watts, and in 1927, increased to 12,500 watts. In the early 1930s, power was raised to the current level of 50,000 watts.

Today, the antenna is located about 30 miles (50 km) southeast of the city of Denver. It is a ⁵/₈ wave, 660 foot (198 m) guyed tower. At night the signal can be heard in over 30 states of the U.S. and over most of Canada and Mexico. KOA sometimes can be picked up in California, which is west of the Rocky Mountains, an obstacle that prevents east coast radio stations from traveling west of the Rockies. KOA is frequently heard in northern Europe, Australia and Japan, and is one of the most frequently reported stations world wide.

KOA has a news/talk format. It is also the flagship station of the Denver Broncos football team and the Colorado Rockies baseball team.

KOA Is the Back Up Emergency Alert System station for Colorado in case the Primary station can't broadcast.

Rocky Mountain News columnist Mike Rosen is the long running host of the 9 to 11:45 a.m. morning show. Mike is a fiscal conservative/social libertarian who occasionally has been substitute host for Rush Limbaugh. The Colorado governor and Denver mayor are regularly scheduled guests on his show. Common Rosen-isms are "tell me where you sit before you tell me where you stand" and "a politician asks what you want, an economist asks what you want more." Mike uses "Mr. Hold Button" on filibustering callers and the Silly Giggle sound effect when callers use mocking laughs in their arguments. Mike's philosophy is reflected in his recommended reading list which includes Ayn Rand, Adam Smith, Paul Johnson and Thomas Sowell.

Other well-known local names heard on KOA include Rick Barber, who hosts the station's overnight show. Regular monthly features on Rick's show include his own unique style of commentary.

Both of the morning and afternoon programs feature constant updates of traffic conditions in the Denver area, broadcast from a helicopter it shares with NBC Station KUSA-TV.

KOA is unusual in that it is one of the few stations that airs The Rush Limbaugh Show on a two-hour tape delay instead of the usual live.

Radio host Alan Berg broadcast his liberal talk show from the station, but was shot and killed by members of the white supremacist group The Order on June 18, 1984. Another host from an earlier era was Leigh Kamman, who hosted jazz programs during World War II. Kamman has long since returned to his home state of Minnesota, but he still regularly hosts music shows on Minnesota Public Radio as of 2005. "The Sports Zoo" with Dave Logan and Scott Hastings ran for 12 years until Hastings left in April 2005 for the Altitude Sports and Entertainment network. Hastings resumed sports radio broadcasting on KKFN in January 2006 alongside former Denver Broncos lineman Alfred Williams. Ken Hamblin, "The Black Avenger," also hosted a show during the 1980s.

Other former hosts: Tom Martino, Rollye James.

• 850 KOA News Talk Radio
• The Rocky Mountain News
• The Independence Institute
• Query the FCC's AM station database for KOA
• Radio Locator Information on KOA

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