WWNO (89.9 FM) is a public, non-commercial radio station in New Orleans, Louisiana. It is owned by the University of New Orleans, offering a news and information radio format with some jazz programs on weekends. Studios and offices are located on the fourth floor of the Earl K. Long Library on the campus of the University of New Orleans on Lakeshore Drive in the Lake Pontchartrain side of New Orleans. The transmitter is off Behrman Highway in the Algiers neighborhood of the city.

WWNO also operates a 24-hour classical music service, "Classical 104.9 FM", on 250 watt FM translator K285FF in Metarie and simulcast in Thibodaux, Louisiana, on KTLN at 90.5 MHz, one of the few dedicated classical stations in the South. WWNO broadcasts in the HD Radio hybrid format. Its HD2 subchannel carries "Classical 104.9 FM". The HD3 subchannel plays jazz music.

WWNO's weekday schedule has several programs from National Public Radio including All Things Considered, Morning Edition, Here & Now and Fresh Air with Terry Gross. Weekend NPR shows include Wait Wait... Don't Tell Me!, This American Life, American Routes and On The Media. Local WWNO programming includes The Reading Life, Out To Lunch, Continuum and Louisiana Eats. The BBC World Service is heard overnight Sunday through Thursday (Monday through Friday mornings). On Friday and Saturday nights, WWNO plays jazz. WWNO has a local news staff covering New Orleans and Louisiana stories, with NPR covering world and national news.

WWNO signed on the air on February 20, 1972. It was soon after the University of New Orleans adopted its current name. The school had previously been known as "Louisiana State University in New Orleans". KTLN was brought on line in 1995.

From its earliest days, WWNO was an NPR network affiliate. Originally WWNO was powered at only 5,000 watts. By 1980, the output had been increased to 50,000 watts on a 600-foot tower. Today the power is 35,000 watts but the height above average terrain (HAAT) has increased to 984 feet (299.8 meters). So WWNO's coverage extends throughout Southeast Louisiana and a section of Southwest Mississippi.

Prior to Hurricane Katrina making landfall in late August 2005, general manager Chuck Miller called extra staff in to the station to help, dropped the regular program format and shared as much information as possible about traffic, evacuation procedures and other news that would be helpful to the 86,000+ people who tune in each week. The building housing the studios had a back-up generator with buried transmission lines. The transmitter site also had generator power. The staff brought extra clothing and other personal items and were prepared to sleep away from windows. Computers and other valuable items were brought into interior rooms.

On the evening before the storm made landfall, the University of New Orleans shut down the IT department without informing the station personnel. WWNO was left without Internet access. Station staff turned to the television and other local radio for sources of information. Miller and the staff found themselves hunkering down in the station the Saturday before Katrina hit with sleeping bags and non-perishables to broadcast through the storm.

Four WWNO staff made it to work during the early morning hours of Sunday, August 28, 2005, Miller, Fred Kasten, James Arey and Jack Hopke. Two people handled the phones and monitored TV and the other two served on-air. Katrina was then declared Category 5 and headed straight for New Orleans. Miller requested and received permission to evacuate the staff from the station. WWNO signed over its signal to a local TV station.