There are 2 US Post Offices in Logan County serving a total of 2,889 residents equating to 1,445 residents per post office. It's estimated that approximately 4,611 packages are handled across the 2 county post offices annually. Logan County (standard abbreviation: LC) is a county located in the U.S. state of Kansas. As of the 2010 census, the county population was 2,756. The largest city and county seat is Oakley. The county was named for Gen. John A. Logan."