Adelphi, MD has a population of 15,554 and is the 2,752nd largest city in the United States. The population density is 5,734 per sq mi which is 1109% higher than the Maryland average and 6229% higher than the national average. The median age in Adelphi is 35 which is approximately 9% lower than the Maryland average of 38. In Adelphi, 43% of the population over 15 years of age are married, 40% speak English and 36% speak Spanish. 20% of Adelphi residents were born in Maryland, 27% were born out of state, 1% were born outside of the United States and 52% were foreign born.
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The population density in Adelphi is 1109% higher than Maryland.
The median age in Adelphi is 9% lower than Maryland.
In Adelphi 18.91% of the population is White.
In Adelphi 37.15% of the population is Black or African American.