The Amalgamated Bank of Chicago (ABOC) is a commercial bank headquartered in Chicago, Illinois, United States. In addition to its downtown Chicago office, the bank has a branch office in Warrenville, Illinois. Until November 1991, the bank was known as Amalgamated Trust & Savings Bank. ABOC announced plans to be acquired by Amalgamated Bank of New York during 2021. In early 2022 Amalgamated Financial (the New York bank's holding company) announced the $98 million acquisition plan was ended due to regulatory difficulties, but ABOC said it could still proceed.