| WSIU | |
| City: | Carbondale, Illinois |
| Area: | Southern Illinois |
| Branding: | Powered by You |
| Frequency: | 91.9 MHz |
| Airdate: | September 15, 1958 |
| Format: | News Talk Information, Classical Music |
| Erp: | 50,000 watts |
| Haat: | 91m (299feet) |
| Class: | B |
| Facility Id: | 61309 |
| Coordinates: | 37.7081°N -89.2347°W |
| Callsign Meaning: | Southern Illinois University |
| Former Callsigns: | WSRV (1958–1960) |
| Owner: | Southern Illinois University-Carbondale |
| Licensee: | Board of Trustees, Southern Illinois University |
| Sister Stations: | WSIU-TV |
| Website: | wsiu.org |
| Licensing Authority: | FCC |
WSIU (91.9 FM, "Powered by You") is a radio station broadcasting a news/talk/information and classical music format.[1] Licensed to Carbondale, Illinois, the station serves Southern Illinois. The station is currently owned by Southern Illinois University Carbondale and features programming from American Public Media, National Public Radio, and Public Radio Exchange.[2] Programming originating from WSIU includes Celtic Connections, a Celtic music show.[3]
WSIU's programming is also heard on WUSI 90.3 FM in Olney, Illinois and WVSI 88.9 FM in Mount Vernon, Illinois
WSIU first took to the air on September 15, 1958, as WSRV (Southern's Radio Voice). It became WSIU in 1960.