Harris Wittels, a producer and writer for the NBC sitcom “Parks and Recreation” who also performed as a stand-up comic and musician, died on Thursday. He was 30.

A spokesman for the Los Angeles Police Department said Mr. Wittels’s body had been found at his home about noon by his assistant, who called the police and reported a possible overdose. He was pronounced dead at the scene, the police said, but a cause of death will not be known until after an autopsy is performed by the Los Angeles County coroner’s office.

The final episode of “Parks and Recreation,” on which Mr. Wittels served as a co-executive producer, as well as a writer and occasional actor, is to be broadcast next week. This is the show’s seventh season.

Mr. Wittels’s death was first reported by TMZ, which said he had performed at a comedy club in Los Angeles on Wednesday night.