There are 9 US Post Offices in Saline County serving a total of 81,954 residents equating to 9,106 residents per post office. It's estimated that approximately 130,808 packages are handled across the 9 county post offices annually. Saline County is a county located in the U.S. state of Arkansas. As of the 2010 census, the population was 107,118. at the 2010 census. Its county seat and largest city is Benton. Saline County was formed on November 2, 1835, and named for the salt water (brine) springs in the area, however, it is pronounced \"suh-LEAN\" instead of the typical pronunciation, \"SAY-lean\". Until November 2014, it was an alcohol prohibition or dry county. Saline County is included in the Little Rock\u2013North Little Rock\u2013Conway, AR Metropolitan Statistical Area."