There are 7 US Post Offices in Pike County serving a total of 10,901 residents equating to 1,557 residents per post office. It's estimated that approximately 17,399 packages are handled across the 7 county post offices annually. Pike County is a county located in the U.S. state of Arkansas. As of the 2010 census, the population was 11,291. The county seat is Murfreesboro. Pike County is Arkansas's 25th county, formed on November 1, 1833, and named for Lieutenant Zebulon Pike, the explorer who discovered Pikes Peak. It is an alcohol prohibition or dry county.