The man entered the TD Bank on Larkfield Road at 7:10 p.m. and demanded money, police said. The teller complied, turning over an unspecified amount of cash. The suspect then fled the bank on foot, heading east, police said.
Police could not immediately provide information about whether the suspect had a weapon.
The suspect was last seen wearing gloves and a dark hooded sweatshirt under a silver-and-blue down jacket.
Anyone with information about this robbery can call Crime Stoppers anonymously at 800-220-TIPS.