In the most recent incident, police were dispatched at 11:16 a.m. Wednesday to a report of a robbery at a PNC Bank branch at 3840 Kennett Pike.
The same suspect is wanted for allegedly robbing three other banks in Delaware.
The first incident happened around 9:06 a.m. on Monday, March 10 at M&T Bank in the Astro Shopping Center in Newark.
The second incident occurred on Friday, April 18 at 11:20 a.m. at the PNC Bank at 4725 Kirkwood Highway in Wilmington.
The third incident happened the same day, several minutes later at the Delaware First Federal Credit Union at 1815 Newport Gap Pike in Wilmington.
All four times the suspect presented the tellers with a demand note. In one incident the suspect fled before he got any money but in the remaining incidents police say he got away with an unknown amount of cash.
No one was injured in any of the incidents.
The suspect is described as a White male, 5'6" to 5'8" tall, 130-140 pounds, approximately 30-35 years old.
Anyone with information is urged to contact Troop 2 Robbery Unit at 302-365-8440. Tips can also be submitted using Delaware Crime Stoppers at 1-800-847-3333 or via the internet at www.tipsubmit.com.