Kennett, MO has a population of 10,500 and is the 3,800th largest city in the United States. The population density is 1,500 per sq mi which is 1566% higher than the Missouri average and 1555% higher than the national average. The median age in Kennett is 41 which is approximately 7% higher than the Missouri average of 38. In Kennett, 54% of the population over 15 years of age are married, 95% speak English and 5% speak Spanish. 67% of Kennett residents were born in Missouri, 31% were born out of state, 0% were born outside of the United States and 2% were foreign born.