 About 9.5% of families and 14.3% of the population were below the poverty line, including 22.1% of those under age 18 and 5.8% of those age 65 or over.The largest single employer in Madison is the Tyson Fresh Meats pork-processing plant, with 1,200 full-time employees.Other major employers are Countryside Home, a nursing home with 93 full-time and 51 part-time employees; Madison City Schools, with 97 full-time employees; and D&D Industries, a manufacturer of wood pallets with 40 full-time employees.