Toronto police allege that Derek Ralph Thomas, 52, robbed six banks between Sept. 9 and Oct. 8, either walking or riding a bicycle up to the banks in question.
The last alleged robbery occurred in the Eglinton Avenue West and Caledonia Road area on Wednesday.
Thomas is described as a black male, six feet three inches tall, weighing 175 pounds with tattoos on both his arms.
Police have released a photo of Thomas. They urge anyone who sees him to call police.
Anyone with information is asked to contact police at 416-808-7350. Information can be passed on anonymously through Crime Stoppers at 416-222-8477.