This subway creep grabbed a 20-year-old woman’s butt on a train in the East Village last month, police said Monday.

The assault occurred March 29 while the woman was standing on the northbound No. 6 train in the Bleecker Street station about 4:30 p.m., cops said.

The victim got off the train at the next stop, police said.

A sketch of the man, who was described as 5-foot-10, 180 pounds and believed to be around 45 years old, was released Monday.