A woman woke up on the Q train to a creep with his hand in her pants in Brooklyn, cops said Sunday.

The 23-year-old woman told police the disturbing encounter happened at about 3 a.m on June 2 while heading southbound near the Stillwell Avenue stop, cops said.

The woman screamed when she woke up with the creep’s hand on her groin underneath her clothing and the man took off when the doors opened at the Coney Island station, police said.