There are 8 US Post Offices in Chisago County serving a total of 42,748 residents equating to 5,344 residents per post office. It's estimated that approximately 68,231 packages are handled across the 8 county post offices annually. Chisago County (/\u0283\u1d7b\u02c8s\u0251\u02d0\u0261o\u028a/ sh\u0259-SAH-go) is a county located in the U.S. state of Minnesota. As of the 2010 census, the population was 53,887. Its county seat is Center City. The county's name comes from Chisago Lake. Chisago County is included in the Minneapolis-St. Paul-Bloomington, MN-WI Metropolitan Statistical Area."