Duncan is a city located in Mississippi. With a 2020 population of 368, it is the 236th largest city in Mississippi and the 14572nd largest city in the United States. Duncan is currently declining at a rate of -2.39% annually and its population has decreased by -13.00% since the most recent census, which recorded a population of 423 in 2010. Duncan reached it's highest population of 422 in 2010. Spanning over 1 miles, Duncan has a population density of 402 people per square mile.
The average household income in Duncan is $47,123 with a poverty rate of 30.38%. The median rental costs in recent years comes to $628 per month, and the median house value is $39,100. The median age in Duncan is 48.5 years, 39.9 years for males, and 48.7 years for females. For every 100 females there are 119.8 males.