WYMG (100.5 FM) is a commercial radio station licensed to Chatham, Illinois, and serving the Springfield metropolitan area.

The station is owned by Saga Communications, and operates as part of its Capitol Radio Group.

WYMG has an effective radiated power (ERP) of 50,000 watts, the current maximum for most FM stations in Illinois.

It was the FM counterpart to WLDS 1180 AM and largely simulcast that station in its early years.

The station has been assigned the call letters WYMG by the Federal Communications Commission since May 1, 1985.