Upper Marlboro is a city located in Maryland. With a 2020 population of 673, it is the 113th largest city in Maryland and the 12055th largest city in the United States. Upper Marlboro is currently declining at a rate of 0.00% annually and its population has increased by 6.66% since the most recent census, which recorded a population of 631 in 2010. Upper Marlboro reached it's highest population of 830 in 2013. Spanning over 0 miles, Upper Marlboro has a population density of 1,639 people per square mile.
The average household income in Upper Marlboro is $95,391 with a poverty rate of 2.90%. The median rental costs in recent years comes to $1,784 per month, and the median house value is $213,400. The median age in Upper Marlboro is 39.5 years, 36.9 years for males, and 41.4 years for females. For every 100 females there are 75.8 males.