St. Martins is a city located in Missouri. With a 2020 population of 1,192, it is the 316th largest city in Missouri and the 9612th largest city in the United States. St. Martins is currently growing at a rate of 0.17% annually and its population has increased by 4.56% since the most recent census, which recorded a population of 1,140 in 2010. Spanning over 2 miles, St. Martins has a population density of 619 people per square mile.
The average household income in St. Martins is $71,302 with a poverty rate of 9.66%. The median rental costs in recent years comes to $694 per month, and the median house value is $171,900. The median age in St. Martins is 43.4 years, 45 years for males, and 42.8 years for females. For every 100 females there are 80.9 males.