It happened around 11:00 Sunday at the Citizens Bank on Skippack Pike.
Police say the suspect displayed a silver handgun during the robbery but no one was injured.
The suspect fled the scene in an unknown vehicle. No word if he got away with any money.
The bandit is described as a white male wearing a fake reddish blonde beard, a black sweatshirt, a grey shirt, black pants and dark sunglasses.
Anyone with information is asked to contact Whitpain Township Police at 610-279-9033.
