Conrad Sulzer Regional Library, formerly Hild Regional Library, is one of two regional libraries in the Chicago Public Library system in Chicago, in the U.S. state of Illinois. It was named for Conrad Sulzer, a 19th-century Swiss settler in what was then Lakeview Township. The library is located in the Lincoln Square neighborhood at 4455 N. Lincoln Ave. It is a full-service library and ADA compliant. As with all libraries in the Chicago Public Library system, it has free Wi-Fi internet service.