There are 4 US Post Offices in Lincoln County serving a total of 54,909 residents equating to 13,727 residents per post office. It's estimated that approximately 87,641 packages are handled across the 4 county post offices annually. Lincoln County is a county located in the U.S. state of Mississippi. As of the 2010 census, the population was 34,869. Its county seat is Brookhaven. The county was created by the legislature in April 7, 1870, during the Reconstruction Era. It was formed from portions of Lawrence, Pike, Franklin, Copiah, and Amite counties. It was named for Abraham Lincoln, the 16th President of the United States. Lincoln County comprises the Brookhaven, MS Micropolitan Statistical Area, which is included in the Jackson-Vicksburg-Brookhaven Combined Statistical Area. The county is southwest of the state capital of Jackson."