Hamilton County
By the numbers: about 371,645 residents (2023 U.S. Census estimate) · 844 licensed amateur radio operators — 409 Technician, 194 General, 39 Advanced, 197 Extra, 5 Novice · 12 licensed club stations · 59 more licenses in the FCC's two-year renewal grace period (FCC licenses, by ZIP).
Since 2000: 487 licensed operators at the end of 2000, 844 today (high of 855 in 2023). Rebuilt from FCC license records, counting each licensee at their current address, so earlier years are approximate. Indiana licensing trends
Ham Radio Clubs
- Hamilton County ARES (N9EOC): hcinares.org | Facebook
Net: Hamilton County ARES Net (Sunday, 8:00 PM, 145.170 MHz and 443.550 MHz (PL 77.0), FM). All nets
Repeater(s): 145.170 MHz (PL 77.0) FM, Hamilton County (K9EOC); 443.550 MHz (PL 77.0) FM, Hamilton County (K9EOC)
- Central Indiana Amateur Radio Association (CIARA) (N9EOC): n9eoc.org | ciara.n9eoc@gmail.com | Facebook | Facebook Group | QRZ
Meetings: 2nd Saturday monthly at 8:00 AM (the club's membership page still lists the 1st Saturday at 10:00 AM at Noblesville Fire Station 76, 16800 Hazel Dell Rd — check the club calendar before you go) — Hamilton County Emergency Operations Center, 18100 Cumberland Rd, Noblesville, IN
Net: Central Indiana Amateur Radio Association (CIARA) Net (Sunday, 8:00 PM, 145.170 MHz and 443.550 MHz (PL 77.0), FM). All nets
License exams: On Saturdays, at least four times a year — Hamilton County Sheriff's office.
As the club publishes it on n9eoc.org — exams — checked September 21, 2026.
- Piglet Radio (N9BCN): pigletradio.org
Meetings: 3rd Monday monthly at 6:30 PM — Wolfie's Grill, 1162 Keystone Way, Carmel, IN 46032Meetings are not restricted to members and are open to the general public; minors must be accompanied by a parent or guardian.
As the club publishes it at sites.google.com, checked September 27, 2026.
A non-profit club in central Indiana, seated in Westfield. It runs member meetings, foxhunts, a monthly POTA activation, Winter Field Day and Indiana QSO Party operations, and several nets; its site carries the calendar.
Repeaters
15 amateur radio repeaters are located in Hamilton County on the 2m and 1.25m and 70cm and 33cm 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 |
|---|---|---|---|---|---|
| 145.14 | -0.6 | — | P25 | Noblesville | NF9K |
| 145.170 | -0.6 | 77.0 | FM | Hamilton County K9EOC | Hamilton County ARES (N9EOC) |
| 145.26 | -0.6 | — | D-STAR | Arcadia | K3HTK |
| 146.865 | -0.6 | 77.0 | FM/Fusion | Hortonville | Hamilton Co. Emergency Comm. Group |
| 224.32 | -1.6 | 88.5 | FM | Arcadia | K3HTK |
| 441.575 | +5.0 | 151.4 | FM/Fusion | Noblesville | NF9K |
| 441.625 | +5.0 | 88.5 | FM | Fishers | W9ZEP |
| 441.9375 | +5.0 | — | D-STAR | Arcadia | K3HTK |
| 443.550 | +5.0 | 77.0 | FM | Hamilton County K9EOC | Hamilton County ARES (N9EOC) |
| 443.625 | +5.0 | 88.5 | FM/Fusion | Arcadia | K3HTK |
| 443.95 | +5.0 | 77.0 | FM/Fusion | Hortonville | Hamilton Co. Emergency Comm. Group |
| 444.4125 | +5.0 | — | DMR | Arcadia | K3HTK |
| 444.625 | +5.0 | 151.4 | FM/P25 | Noblesville | NF9K |
| 927.0875 | -25.0 | 88.5 | FM | Arcadia | K3HTK |
| 927.5375 | -25.0 | 151.4 | FM | Noblesville | NF9K |
Unconfirmed listings
These machines are listed on ARTSCIPUB, a user-submitted directory, and nowhere else we can find — not in the Indiana Repeater Council’s records and not on a club’s own page. A listing may be years out of date, so treat each one as unconfirmed. Know one is on the air, gone, or different? Let us know, or have the sponsoring club say so on its website.
| Frequency | Offset | Tone | Location | Call | Source |
|---|---|---|---|---|---|
| 443.6 | +5 | 156.7 | Fishers | W9VCS | Unconfirmed — listed on ARTSCIPUB only |
| 443.95 | +5 | 77 | Carmel | N9EOC | Unconfirmed — listed on ARTSCIPUB only |
View Hamilton County on RepeaterBookBrowse all Indiana repeaters
Emergency Communications
Hamilton County is part of Indiana ARES District 5 (which mirrors IDHS District 5). Learn how amateur radio supports emergencies in Indiana — ARES, RACES, and Skywarn — on our EmComm page.
County emergency management
Hamilton County's emergency management agency plans for disasters and coordinates the local response. For current contact information, visit the Hamilton 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
Hamilton County is in Indiana ARES District 5. 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; Hamilton County ARES sent in its own update for the June 2026 report.
- District 5 Emergency Coordinator: not listed as filled or vacant; District 5 sent in its own update for the May 2026 report.
To join ARES in Hamilton 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
- Hamilton County Emergency Management Communications Group: the volunteer communications group of the county's emergency management agency, described on the county's RACES page.
- 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
Hamilton 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 Hamilton County come from National Weather Service Indianapolis, IN. Local radar: station KIND.
Nets
3 nets meet in Hamilton County, and more are within range from the counties around it — a repeater does not stop at the county line. See the nets near Hamilton County, searchable by ZIP code and distance, along with the statewide HF nets.
📅 Put this county in your calendar.indianahamradio.com/calendars/hamilton.ics is a subscribable calendar of Hamilton 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
Hamilton County borders 6 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/hamilton.json · about the data