|Broadcast area||Amherst Island|
|Branding||Amherst Island Public Radio|
|Frequency||92.1 MHz (FM)|
|First air date||April 1, 2006|
|ERP||166 watts average|
250 Ws peak
horizontal polarization only
|HAAT||18 meters (59 ft)|
|Callsign meaning||C J Amherst Island|
|Owner||Amherst Island Radio Broadcasting Inc.|
CJAI-FM, known on air as Amherst Island Radio, is a radio station in Stella, Ontario, Canada. Broadcasting at 92.1 FM, the station airs a community radio format serving the Loyalist Township and Kingston region.
The station launched on April 1, 2006, originally on 93.7 FM with a power of 5 watts. Previously licensed as a developmental community radio station, Amherst Island Radio changed frequency to 92.1 FM in October 2007 following the licensing of a new radio station on the adjacent 93.5 frequency in Kingston, and was granted a permanent license on December 6, 2007. It now operates as a 250-watt class B community broadcast undertaking and the current license expires on 31 August 2021. 
The station is 100% volunteer-run and 100% non-profit, and is the only Canadian broadcast station located in a barn. Operating from the barn's 14 ft x 19 ft milkhouse, it houses two studios (each 6 ft x 7 ft) and its antenna is high atop the barn's 85 ft silo. Altogether, it is one of the smallest legally licensed broadcast stations in the world.
Personalities associated with the station have included former television anchor Peter Trueman, as well as community members including Terry Culbert, Adam Miller, Judy Chui, Brian Little, Shell Madden, Leah Murray, Ellis & Mary Lou Wolfreys, Ross Haines, Doug Green, Jack Smith, Dayle Gowan, Susan Filson, Janet Scott, Peter Large, Ula Stief, Leah Murray, Ian Murray, Sally Bowen, Rosemary Richmond, Jim Gould, Don Ross, Michael Rowan, Fae MacArthur, Steve Kennedy, Keith Miller, Cheryl Saunders, Cathy Christmas, Eric Tremblay, Devin Stewart, Nic Rossetti, Larry Jensen, Shannon Myra, Derek Wagar, Dan Simpson, Jef Leeson and Duane Hudson.
The LP record and production studio has been dedicated as the "Alan M. Kidd Studio", in memory of a longtime community volunteer and station programmer who died on November 30, 2008.
Funding of the station comes through donations, memberships, sponsorships, and fundraising events.
Musical content on Amherst Island Radio is approximately 60 per cent Canadian content on average and spans numerous genres: bluegrass, country, folk, rock, alternative rock, indie rock, pop, blues, jazz, classical, etc. Volunteers produce spoken word programming and several times per week local bands and special guests entertain listeners with in-studio performances/appearances. The diversity of programming is a reflection of the listeners in the station's broadcasting area.
Amherst Island Radio is a member of the National Campus and Community Radio Association.