| KKBJ-FM | |
| City: | Bemidji, Minnesota |
| Branding: | Mix 103.7 |
| Frequency: | 103.7 MHz |
| Format: | Commercial |
| Erp: | 100,000 Watts |
| Haat: | 146 meters |
| Class: | C1 |
| Callsign Meaning: | BemidJi |
| Owner: | RP Broadcasting |
| Webcast: | Listen Live! |
| Sister Stations: | KKBJ, WBJI, WMIS-FM |
| Website: | https://www.kkbj.com/ |
| Affiliations: | Fox News Radio Premiere Networks Westwood One |
| Licensing Authority: | FCC |
KKBJ-FM (103.7 FM), known on-air as "Mix 103.7", is a radio station based in Bemidji, Minnesota, that airs a Top 40 (CHR) format.
The station previously had a Top 40 (CHR) format as B-103, "Today's Best Music" and flipped to adult contemporary as Mix 103.7 in 1994, after being sold to RP Broadcasting. The station switched to hot adult contemporary format a few years later. In recent years, the station began evolving to a Top 40 (CHR). The station plays the Daily Download with Carson Daly every Saturday morning and Backtrax USA and the American Top 40 with Ryan Seacrest every Sunday.