Serbia - North is the top region by working age population (aged 15-64) in Serbia. As of 2011, working age population (aged 15-64) in Serbia - North was 2.49 million persons that accounts for 50.35% of Serbia's working age population (aged 15-64). The top 2 regions (others are Serbia - South) account for 100.00% of it. Serbia's total working age population (aged 15-64) was estimated at 4.95 million persons in 2011.