There are 6 US Post Offices in Steuben County serving a total of 34,928 residents equating to 5,821 residents per post office. It's estimated that approximately 55,749 packages are handled across the 6 county post offices annually. Steuben County is a county located in the northeast corner of the U.S. state of Indiana. The county was named after Baron von Steuben, a Prussian military officer who helped train the Continental Army during the American Revolutionary War. Today, the county contains a state park and 105 lakes of various sizes. Some of the larger lakes are Lake James, Lake George, Clear Lake, Jimmerson Lake, Lake Gage, and Crooked Lake. As of 2010, the county population was 34,185. The county seat is Angola."