There are 4 US Post Offices in Lincoln County serving a total of 3,132 residents equating to 783 residents per post office. It's estimated that approximately 4,999 packages are handled across the 4 county post offices annually. Lincoln County (standard abbreviation: LC) is a county located in the U.S. state of Kansas. As of the 2010 census, the county population was 3,241. The largest city and county seat is Lincoln Center."