Smithville is a city located in Clay County Missouri. With a 2020 population of 11,895, it is the 67th largest city in Missouri and the 2738th largest city in the United States . Smithville is currently growing at a rate of 4.85% annually and its population has increased by 41.19% since the most recent census, which recorded a population of 8,425 in 2010. Smithville reached it's highest population of 11,895 in 2021. Spanning over 16 miles, Smithville has a population density of 747 people per square mile.
The average household income in Smithville is $91,908 with a poverty rate of 6.40%. The median rental costs in recent years comes to $799 per month, and the median house value is $194,500. The median age in Smithville is 35.4 years, 34 years for males, and 38.1 years for females.