The second robbery happened at 10:10 a.m. at the Citizens Bank branch located at 700 Market Street.
In both instances, the man entered the bank and gave a teller a threatening note. After getting cash, police say the man fled on foot.
He was last seen heading south on 7th Street after the second bank robbery.
The suspect is described as a white male in his 40's, 5'9" to 5'11" tall, medium build, with salt and pepper hair.
He was wearing a navy blue baseball cap with unidentified logos or markings on the front and on the bill, a navy blue zipper front or pullover jacket with an unidentified logo on the left chest and a word or words on the outside of the left upper arm, a white or light-colored hooded sweatshirt underneath the jacket, dark jeans and black sneakers.
This suspect is considered armed and dangerous.
Anyone with information is asked to call the FBI at 215-418-4000 or the Philadelphia Police Department. There may be a reward available for information that leads to the arrest and conviction of this subject. Tipsters can remain anonymous.
You can get the latest crime statistics from the Philadelphia Police by CLICKING HERE for the force's crime data mapping site.
CLICK HERE to follow Action News on Twitter
CLICK HERE to get Action News on your website
CLICK HERE to find Action News on Facebook
