 About 31.2% of families and 34.2% of the population were below the poverty line, including 49.9% of those under age 18 and 24.4% of those age 65 or over.The Calhoun County School System includes Calhoun County High School-Middle School, which serves Calhoun County and some students from the cities of Arlington, Edison, Leary, and Morgan.Calhoun County Elementary School is in Arlington.