Oakville, MO has a population of 36,838 and is the 1,137th largest city in the United States. The population density is 2,313 per sq mi which is 2577% higher than the Missouri average and 2453% higher than the national average. The median age in Oakville is 45 which is approximately 17% higher than the Missouri average of 38. In Oakville, 67% of the population over 15 years of age are married, 96% speak English and 0% speak Spanish. 79% of Oakville residents were born in Missouri, 17% were born out of state, 1% were born outside of the United States and 3% were foreign born.