KOAC may refer to:
- KOAC (AM), a radio station (550 AM) licensed to Corvallis, Oregon, United States
- KOAC-FM, a radio station (89.7 FM) licensed to Astoria, Oregon, United States
- KOAC-TV, a television station (channel 7 analog/39 digital) licensed to Corvallis, Oregon, United States
KOAC (550 AM) is a radio station licensed to Corvallis, Oregon. The station is owned by Oregon Public Broadcasting, and airs OPBs news and talk programming, consisting of syndicated programming from NPR, APM and PRI, as well as locally produced offerings.
KOAC (AM) is the only directional AM radio station in the United States which uses a shunt-fed antenna.