The robbery happened at 3:34 p.m. at the North Community Bank branch, 1555 N. Damen Ave., according to the FBI.
The woman went into the bank and was carrying a backpack and appeared to have wires around her waist, FBI officials said.
The woman was described as a Hispanic woman in her 20s to early 30s. She was about 5 feet 4 inches to 5 feet 5 inches tall with brown hair and brown eyes. She had a tattoo on her neck, the FBI said.