Fire crews and the state Forest Fire Service arrived on the scene of a fire just before 4 p.m. Tuesday on Estell Manor Road off Route 49 in Maurice River Township.
By Tuesday evening, the fire had spread to 75 acres and burned four mobile homes, according to NJ.com.
It is unknown whether anyone was living in the homes and no injuries have been reported, the report said.
It is unclear what started the fire, but authorities said they think it started in a private structure.
Authorities also said they expect to have the fire contained by midnight, the report said.