WZLX is a classic rock radio station in Boston, Massachusetts. This station is owned and operated by iHeartMedia. WZLX was one of America's first classic rock FM stations. Its studios are in Medford, and its transmitter is atop the Prudential Tower.

Classic rock is a radio format that developed from the album-oriented rock (AOR) format in the early 1980s. In the United States, it comprises rock music ranging generally from the mid-1960s through the mid-1990s, primarily focusing on commercially successful blues rock and hard rock popularized in the 1970s AOR format. The radio format became increasingly popular with the baby boomer demographic by the end of the 1990s.