Bay St. Louis is a city located in Mississippi. With a 2020 population of 14,515, it is the 27th largest city in Mississippi and the 2351st largest city in the United States. Bay St. Louis is currently growing at a rate of 3.57% annually and its population has increased by 56.75% since the most recent census, which recorded a population of 9,260 in 2010. Spanning over 27 miles, Bay St. Louis has a population density of 988 people per square mile.
The average household income in Bay St. Louis is $54,412 with a poverty rate of 25.13%. The median rental costs in recent years comes to $776 per month, and the median house value is $170,400. The median age in Bay St. Louis is 43.1 years, 38.6 years for males, and 45.6 years for females. For every 100 females there are 92.3 males.