Police said a black male entered a TCF Bank branch located inside the Jewel Food Store at 1250 W. Main St.
He reportedly approached the counter and gave the teller a note announcing a bank robbery.
Police said the suspect fled the bank on foot after receiving an undisclosed amount of cash.
No weapons were observed and no injuries were reported, police said.
The suspect is described as being in his late 20s or early 30s, and is 6 feet to 6 feet 3 inches. He also has a stocky build and was wearing gloves, police said.
Anyone having any information regarding the bank robbery or the suspect is asked to call the FBI's Chicago office at 312-421-6700 or the West Dundee Police Department.
The FBI is working with the West Dundee Police Department on this investigation.