Marietta is a city located in Mississippi. With a 2020 population of 252, it is the 262nd largest city in Mississippi and the 15944th largest city in the United States. Marietta is currently declining at a rate of -0.79% annually and its population has decreased by -1.56% since the most recent census, which recorded a population of 256 in 2010. Marietta reached it's highest population of 258 in 2014. Spanning over 2 miles, Marietta has a population density of 142 people per square mile.
The average household income in Marietta is $53,403 with a poverty rate of 14.11%. The median rental costs in recent years comes to $600 per month, and the median house value is $81,100. The median age in Marietta is 50.2 years, 50 years for males, and 50.8 years for females. For every 100 females there are 92.2 males.