Hattiesburg is a city located in Forrest County, Mississippi. With a 2020 population of 45,309, it is the 5th largest city in Mississippi (after Jackson, Gulfport, Southaven, and Biloxi) and the 865th largest city in the United States. Hattiesburg is currently declining at a rate of -0.70% annually and its population has decreased by -1.48% since the most recent census, which recorded a population of 45,989 in 2010. Hattiesburg reached it's highest population of 46,853 in 2013. Spanning over 54 miles, Hattiesburg has a population density of 848 people per square mile.
The average household income in Hattiesburg is $49,442 with a poverty rate of 32.52%. The median rental costs in recent years comes to $774 per month, and the median house value is $112,100. The median age in Hattiesburg is 28.7 years, 28.6 years for males, and 28.8 years for females. For every 100 females there are 84.9 males.