go Results Found: 2 Button group with nested dropdown Gold Crossroads The largest chamber in Lake County, representing approximately 600 businesses. The largest chamber in Lake County, representing approximately 600 businesses. 440 W 84th Drive Merrillville IN 46410-5431 (219) 769-8180 Black Chamber of Commerce Black Chamber of Commerce 1607 E. Columbus Dr East Chicago IN 46312 (219) 802-0229