Madison, MO has a population of 692 and is the 17,556th largest city in the United States. The population density is 1,544 per sq mi which is 1687% higher than the Missouri average and 1604% higher than the national average. The median age in Madison is 34 which is approximately 13% lower than the Missouri average of 38. In Madison, 50% of the population over 15 years of age are married, 98% speak English and 2% speak Spanish. 82% of Madison residents were born in Missouri, 16% were born out of state, 0% were born outside of the United States and 1% were foreign born.