St. Robert is a city located in Missouri. With a 2020 population of 5,786, it is the 118th largest city in Missouri and the 4377th largest city in the United States. St. Robert is currently declining at a rate of -0.31% annually but its population has increased by 33.32% since the most recent census, which recorded a population of 4,340 in 2010. St. Robert reached it's highest population of 5,822 in 2018. Spanning over 8 miles, St. Robert has a population density of 689 people per square mile.
The average household income in St. Robert is $58,396 with a poverty rate of 21.11%. The median rental costs in recent years comes to $869 per month, and the median house value is $172,400. The median age in St. Robert is 37.5 years, 34.7 years for males, and 38.6 years for females. For every 100 females there are 107.2 males.