St. Joseph is a city located in Buchanan County Missouri. With a 2020 population of 73,417, it is the 8th largest city in Missouri and the 498th largest city in the United States . St. Joseph is currently declining at a rate of -0.98% annually and its population has decreased by -4.38% since the most recent census, which recorded a population of 76,780 in 2010. St. Joseph reached it's highest population of in . Spanning over 45 miles, St. Joseph has a population density of 1,667 people per square mile.
The average household income in St. Joseph is $63,289 with a poverty rate of 18.73%. The median rental costs in recent years comes to $782 per month, and the median house value is $114,100. The median age in St. Joseph is 36.8 years, 35.6 years for males, and 38.2 years for females.