Dexter, MO has a population of 7,934 and is the 4,717th largest city in the United States. The population density is 1,217 per sq mi which is 1309% higher than the Missouri average and 1244% higher than the national average. The median age in Dexter is 40 which is approximately 5% higher than the Missouri average of 38. In Dexter, 59% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 74% of Dexter residents were born in Missouri, 25% were born out of state, 0% were born outside of the United States and 1% were foreign born.