Cardwell, MO has a population of 708 and is the 17,411th largest city in the United States. The population density is 1,124 per sq mi which is 1201% higher than the Missouri average and 1141% higher than the national average. The median age in Cardwell is 37 which is approximately 4% lower than the Missouri average of 38. In Cardwell, 45% of the population over 15 years of age are married, 87% speak English and 11% speak Spanish. 34% of Cardwell residents were born in Missouri, 61% were born out of state, 0% were born outside of the United States and 5% were foreign born.