The station was founded in 1971 by John and Carol Babina. The Monroe Board of Education agreed to hold the FCC license for WMNR and provided facilities for the station at Masuk High School. The equipment was paid for with donations from individual and businesses, and the station turned into a community project. The station began broadcasting regularly in 1974 with a variety of programming, including rock, big band, and classical.

In 1980, it was thought that WMNR could fulfill a need for public radio in Fairfield county. A non-profit organization, Monroe Public Radio, Inc., began operating the station at this time. In early 1982, it became an NPR affiliate, and was able to secure a one-time federal grant for new equipment to increase power. However, before any of this could be done, Monroe Public Radio, Inc. ran out of funds and the station's operation returned to the founders, John and Carol Babina. In mid-1982, WMNR began broadcasting classical music and was run by a staff of volunteers.

As the years progressed, three other stations in Connecticut were added to simulcast WMNR. WRXC (90.1 FM) in Shelton was assigned its call letters on March 20, 1986 and began broadcasting in 1988. The following year, WGSK (90.1 FM) in South Kent received its call sign on December 14, 1987, but would not commence broadcasting until 1996. WGRS (91.5 FM) in Guilford was assigned its call sign on May 31, 1993 and began broadcasting that same year.

By 2003, they had outgrown their allotted space at the high school and moved into rented office space. In 2009, the licenses for WMNR were transferred from the Monroe Board of Education to the Town of Monroe.

Stations

WGRS 91.5 FM Guilford, CT 3,100 watts

WGSK 90.1 FM South Kent, CT 77 watts

WMNR 88.1 FM Monroe, CT 5,000 watts

WRXC 90.1 FM Shelton, CT 45 watts

Translators

Several translators are authorized to rebroadcast these stations, including four translators on eastern Long Island and one in Westchester County, New York.

W209CJ 89.7 Mount Kisco, NY 38 watts

W218AV 91.5 Warren, CT 250 watts

W220AC 91.9 Fairfield, CT 19 watts

W262AS 100.3 Bridgehampton, NY 27 watts

Broadcast translators of WRXC

W220CF 91.9 Huntington, CT 7 watts

Broadcast translators of WGRS

W220CE 91.9 Southington, CT 1 watt

W220CH 91.9 West Hartford, CT 8 watts

W233AG 94.5 New London, CT 55 watts

W233AI 94.5 Sag Harbor, NY 27 watts

W233AJ 94.5 Old Saybrook, CT 38 watts

W252AS 98.3 New Haven, CT 19 watts

W264AJ 100.7 Southampton, NY 250 watts

W287AZ 105.3 Southport, CT 50 watts

W289AX 105.7 East Hampton, NY 10 watts