| KYJK | |
| City: | Missoula, Montana |
| Area: | Missoula, Montana |
| Branding: | 105.9 Jack FM |
| Frequency: | 105.9 MHz |
| Sister Stations: | KDTR, KKVU |
| Airdate: | May 5, 2005 |
| Format: | Adult Hits |
| Erp: | 1,950 watts |
| Haat: | 635 meters |
| Class: | C2 |
| Facility Id: | 162326 |
| Coordinates: | 46.8016°N -113.9738°W |
| Callsign Meaning: | K Y JacK |
| Owner: | Missoula Broadcasting Company, LLC |
| Website: | jackfmmissoula.com |
| Licensing Authority: | FCC |
KYJK (105.9 FM, "105.9 Jack FM") is a commercial radio station licensed to Missoula, Montana, owned by Missoula Broadcasting Company, LLC. KYJK airs an Adult Hits music format, using the trademarked "Jack FM" handle.
KYJK has filed an application for a U.S. Federal Communications Commission construction permit to increase its ERP to 2,000 watts.