Plaquemine is a city located in Louisiana. With a 2020 population of 6,605, it is the 51st largest city in Louisiana and the 4071st largest city in the United States. Plaquemine is currently declining at a rate of -0.12% annually and its population has decreased by -7.22% since the most recent census, which recorded a population of 7,119 in 2010. Plaquemine reached it's highest population of 7,739 in 1970. Spanning over 3 miles, Plaquemine has a population density of 2,262 people per square mile.
The average household income in Plaquemine is $59,818 with a poverty rate of 25.27%. The median rental costs in recent years comes to $868 per month, and the median house value is $156,300. The median age in Plaquemine is 32 years, 28.9 years for males, and 34.6 years for females. For every 100 females there are 77.9 males.