Police are searching for a pervert who has groped six women on the Upper East Side.

The man, who grabbed a woman’s buttocks on East 85th Street at East End Avenue Wednesday, is believed responsible for five similar attacks over the last six months.

He first struck on Jan. 5, when he grabbed a 28-year-old woman on her way into her apartment.

He didn’t surface again until May 18th, when he struck four more times.

All of his victims were between the ages of 25 and 31, and all of the crimes happened at night.