sentences:  About 19.1% of families and 26.8% of the population were below the poverty line, including 25.4% of those under age 18 and 27.5% of those age 65 or over.Demopolis is governed by a mayor–council system.The mayor is elected at large to a four-year term and functions as the executive officer, appointing department heads and advisory board members and signing off on all motions, resolutions and ordinances passed by the council.