Jefferson County

By the numbers: about 33,056 residents (2023 U.S. Census estimate) · roughly 91 licensed amateur radio operators (FCC active licenses, by ZIP).

Ham Radio Clubs

• Clifty Amateur Radio Society (W9EFU): w9efu.wordpress.com | ka9pij@arrl.org | Facebook Group | QRZ

  Meetings: 1st Thursday monthly at 7:00 PM — Jefferson County EMA Building, 620 Green Rd, Madison, IN

  Nets: Thursdays 7:30 PM on 145.170 MHz (−0.6, PL 103.5) except meeting nights; 3rd-Thursday 70cm net on 443.475 MHz (+5, PL 103.5)

  Repeater(s): 145.170 MHz (−0.6, PL 103.5) FM, Madison; 443.475 MHz (+5, PL 103.5) FM, Madison

Repeaters

View the repeater listing for Jefferson County on RepeaterBook (opens in a new tab):

Emergency Communications

Jefferson County is part of Indiana ARES District 9 (which mirrors IDHS District 9). Learn how amateur radio supports emergencies in Indiana — ARES, RACES, and Skywarn — on our EmComm page.

Severe-weather watches and warnings for Jefferson County come from the National Weather Service — NWS Louisville office. Trained Skywarn spotters relay reports during severe weather; see our EmComm page.

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.