There are 48 US Post Offices in Hennepin County serving a total of 861,431 residents equating to 17,946 residents per post office. It's estimated that approximately 1,374,940 packages are handled across the 48 county post offices annually. Hennepin County /\u02c8h\u025bn\u0259p\u026an ka\u028anti/ is a county located in the U.S. state of Minnesota. As of the 2010 census the population was 1,152,425. It is the most populous county in Minnesota and the 34th-most populous county in the United States; more than one in five Minnesotans live in Hennepin County. Its county seat is Minneapolis, the most populous city in the state. The county is named in honor of the 17th-century explorer Father Louis Hennepin. Hennepin County is included in the Minneapolis-St. Paul-Bloomington, MN-WI Metropolitan Statistical Area. The center of population of Minnesota is located in Hennepin County, in the city of Minneapolis."