Police say the man entered the bank just before 5 p.m. and talked with two employees before telling them he was robbing the bank.
Officials say he didn't display a weapon and made off with an undisclosed amount of cash.
Police describe the man as a white male adult in his 50s or 60s, 5'8"-6'0" tall, with this grey hair and facial hair.
He was seen wearing a beanie cap over a baseball cap, green coat with the words "fresh produce" and blue jeans.
Anyone with information is urged to call Crime Stoppers at 343-COPS or the Garden City Police Department at 472-2950.