Walnut is a city located in Mississippi. With a 2020 population of 740, it is the 179th largest city in Mississippi and the 11640th largest city in the United States. Walnut is currently declining at a rate of -0.94% annually and its population has decreased by -4.02% since the most recent census, which recorded a population of 771 in 2010. Walnut reached it's highest population of 769 in 2010. Spanning over 5 miles, Walnut has a population density of 136 people per square mile.
The average household income in Walnut is $37,029 with a poverty rate of 45.10%. The median rental costs in recent years comes to $483 per month, and the median house value is $65,700. The median age in Walnut is 29.8 years, 31.6 years for males, and 29.3 years for females. For every 100 females there are 80.2 males.