Vermont State Police say it happened at the Circle K gas station on Main Street just before 7 p.m. on Thursday.
Police say a man, armed with a knife, walked into the store and demanded money.
Police say the suspect was wearing a dark hooded sweatshirt, green baseball-style cap, sunglasses, gloves and a mask over his face. He was wearing gray sweatpants and work boots. He was average in height and had a slender build.
No injuries were reported.
Anyone with information is asked to call Vermont State Police in Derby at 802-334-8881 or Northeast Kingdom Crimestoppers at 802-748-2222.
Copyright 2015 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.