Knox County
By the numbers: about 36,070 residents (2023 U.S. Census estimate) · 90 licensed amateur radio operators — 46 Technician, 25 General, 1 Advanced, 18 Extra · 2 licensed club stations · 17 more licenses in the FCC's two-year renewal grace period (FCC licenses, by ZIP).
Since 2000: 107 licensed operators at the end of 2000, 90 today (high of 108 in 2004). Rebuilt from FCC license records, counting each licensee at their current address, so earlier years are approximate. Indiana licensing trends
Ham Radio Clubs
- Old Post Amateur Radio Society (W9EOC): Facebook Group | QRZ
Meetings: 1st Wednesday monthly at 7:30 PM — Civil Defense Office, Vincennes, IN
Operates the 146.670 MHz (−, PL 91.5) and 443.675 MHz (PL 91.5) repeaters in Vincennes.
Repeaters
6 amateur radio repeaters are located in Knox County on the 2m and 1.25m and 70cm bands. Machines in bordering counties are often reachable too — see the full directory. A dash means we don’t have that detail on file; check with the sponsoring club before you rely on it.
| Frequency | Offset | Tone | Mode | Location | Sponsor |
|---|---|---|---|---|---|
| 146.67 | -0.6 | 91.5 | FM/Fusion | Vincennes | OPARS |
| 146.925 | -0.6 | 107.2 | FM/Fusion | Vincennes | W9ILS - Indiana Link South - WIRES-X 43844 |
| 147.12 | +0.6 | 107.2 | FM/Fusion | Vincennes | W9ILS - Indiana Link South - WIRES-X 43844 |
| 224.6 | -1.6 | 94.8 | FM | Vincennes | W9ILS - Indiana Link South - WIRES-X 43844 |
| 443.675 | +5.0 | 91.5 | FM | Vincennes | OPARS |
| 443.925 | +5.0 | 107.2 | FM/Fusion | Vincennes | W9ILS - Indiana Link South - WIRES-X 43844 |
View Knox County on RepeaterBookBrowse all Indiana repeaters
Emergency Communications
Knox County is part of Indiana ARES District 10 (which mirrors IDHS District 10). Learn how amateur radio supports emergencies in Indiana — ARES, RACES, and Skywarn — on our EmComm page.
County emergency management
Knox County's emergency management agency plans for disasters and coordinates the local response. For current contact information, visit the Knox County emergency management website.
The Indiana Department of Homeland Security keeps a directory of every county's agency: IDHS county EMA directory (website link as listed there on October 26, 2026).
ARES
Knox County is in Indiana ARES District 10. The ARRL Indiana Section's monthly report notes whether each ARES leadership position is filled or vacant.
- County Emergency Coordinator: not listed as filled or vacant; Knox County ARES sent in its own update for the June 2026 report.
- District 10 Emergency Coordinator: no status given in recent Section reports.
To join ARES in Knox County, find current Section leadership contacts on the ARRL Indiana Section page and the Section's emergency communications page. The ARRL also explains how ARES works.
Role status from Indiana Section News (latest issue June 2026), checked October 27, 2026. Each line uses the most recent report that mentions the position.
RACES and AUXCOMM
- Licensed amateurs anywhere in Indiana can volunteer with the Indiana Department of Homeland Security's auxiliary communications team: about IDHS AUXCOMM · volunteer interest form
Skywarn spotter training
Knox County's spotter training comes from the NWS Indianapolis office. Spotter classes are usually held from late winter into early spring, and each county's emergency management agency arranges its local class. NWS Indianapolis spotter training
The information on this page may not be fully up to date. If you notice anything incorrect or missing, please email campbell@indianahamradio.com with the correction. Club officers: email the same address with your club's meeting, net, event or website changes, and we will update this page.
National Weather Service office
Severe-weather watches and warnings for Knox County come from National Weather Service Indianapolis, IN. Local radar: station KVWX.
Nets
3 nets meet in Knox County, and more are within range from the counties around it — a repeater does not stop at the county line. See the nets near Knox County, searchable by ZIP code and distance, along with the statewide HF nets.
📅 Put this county in your calendar.indianahamradio.com/calendars/knox.ics is a subscribable calendar of Knox County’s nets, hamfests and exam sessions — subscribe once in Google, Apple or Outlook and it stays current on its own. Clubs without a calendar are welcome to hand it to their members as theirs.
Nearby counties
Knox County borders 5 other counties. Repeaters and clubs just across the line are usually well within range, so it is worth checking them too:
Everything on this page as JSON: /data/counties/knox.json · about the data