The incident took place in Dutchess County around 10 p.m. on Thursday, Dec. 14 at the Valero Gas Station on Route 55 in LaGrange.
Capt. John Watterson of the Dutchess County Sheriff's Office said a man dressed in black displayed a handgun and then stole cash before running from the area on foot.
At this time no arrest has been made and the investigation is continuing, Watterson said.
Anyone with information should contact the Dutchess County Sheriff's Office at 845-486-3800.
Click here to follow Daily Voice Poughkeepsie and receive free news updates.