WXLO (104.5 FM; "104.5 XLO") is a hot adult contemporary radio station owned by Cumulus Media, licensed to Fitchburg, Massachusetts, and serving the Worcester and Boston markets.

In 1991, the call sign was modified to WXLO-FM when its then-sister station WFGL (960 AM) became WXLO as part of a maintenance simulcast of the FM's programming while its owners looked to sell the AM off, which was done in 1994.

Outside the station's hot AC format, WXLO airs specialty programming, and the Awesome '80s Saturday Night.

WXLO also hosts an annual Acoustic Christmas event at Mechanics Hall in Worcester that has featured artists such as Train, Guster, Lee Dewyze, Daughtry, Delta Rae, Steven Page, Gavin DeGraw, Andy Grammer, and the Goo Goo Dolls.

On-air personalities include Jen Carter and Frank Foley in the Morning, Laura St. James, Rick Brackett, Diana "Lady D." Steele, and Tim Brennan.