Hattiesburg is a city located in Forrest County Mississippi. It is also the county seat of Forrest County. With a 2020 population of 45,845, it is the 5th largest city in Mississippi (after Jackson, Gulfport, Southaven, and Biloxi) and the 862nd largest city in the United States . Hattiesburg is currently declining at a rate of -0.02% annually and its population has decreased by -0.31% since the most recent census, which recorded a population of 45,989 in 2010. Hattiesburg reached it's highest population of 46,855 in 2013. Spanning over 54 miles, Hattiesburg has a population density of 858 people per square mile.
The average household income in Hattiesburg is $52,047 with a poverty rate of 32.45%. The median rental costs in recent years comes to $791 per month, and the median house value is $113,200. The median age in Hattiesburg is 29 years, 29 years for males, and 29.1 years for females.