Adelphi is a city located in Maryland. Adelphi has a 2020 population of 15,751. Adelphi is currently declining at a rate of 0.00% annually and its population has increased by 4.41% since the most recent census, which recorded a population of 15,086 in 2010. Adelphi reached it's highest population of 15,898 in 2017.
The average household income in Adelphi is $85,102 with a poverty rate of 12.47%. The median rental costs in recent years comes to $1,451 per month, and the median house value is $269,700. The median age in Adelphi is 33.8 years, 31.2 years for males, and 36.4 years for females. For every 100 females there are 117.6 males.