St. Martinville is a city located in Louisiana. With a 2020 population of 5,696, it is the 56th largest city in Louisiana and the 4419th largest city in the United States . St. Martinville is currently declining at a rate of -1.08% annually and its population has decreased by -6.84% since the most recent census, which recorded a population of 6,114 in 2010. St. Martinville reached it's highest population of 7,965 in 1980. Spanning over 3 miles, St. Martinville has a population density of 1,843 people per square mile.
The average household income in St. Martinville is $45,840 with a poverty rate of 28.19%. The median rental costs in recent years comes to $602 per month, and the median house value is $125,600. The median age in St. Martinville is 47.5 years, 37.3 years for males, and 49.6 years for females.