Adelphi, MD: Population, ZIP Codes & Nearby Cities

Adelphi is an unincorporated community or census-designated place in Prince George's County, Maryland. In the dataset behind this page it has an estimated population of 16,377, sits at 39.002°N, 76.965°W, and observes Eastern time. Below you will find how it ranks inside Maryland, which ZIP codes it uses, the closest places around it, and how far it is from major US cities.

What are the key facts about Adelphi, MD?

What is the population of Adelphi, MD?

Adelphi has an estimated population of 16,377. That makes it the 88th largest of the 510 places we list in Maryland, and the 20th largest of 79 places in Prince George's County. The typical place in Maryland has about 2,304 residents, so Adelphi is roughly 7.1 times the size of a typical neighbor in the state.

Estimates for places of this size carry wider margins of error than those for big cities, so treat the figure as a guide to scale. Our guide to understanding city population numbers explains why sources disagree.

Places in Maryland with a similar population include Calverton (16,888), Glenmont (16,659), East Riverdale (16,416), Hillcrest Heights (16,388), Aberdeen (16,019). Comparing these pages is a quick way to see how Adelphi differs from communities of the same scale.

How dense is Adelphi?

Adelphi has about 6,029 people per square mile (2,328 per square kilometer), which we classify as an urban core. Within Maryland, it is denser than about 94% of the listed places. Streets at this level typically mix apartment buildings, mixed-use blocks and frequent transit, and many errands can be done on foot. Read how to interpret population density to see how we draw these lines.

What ZIP codes does Adelphi use?

Adelphi uses 3 ZIP codes: 20783, 20903, 20787. Several codes in one place usually reflect separate delivery areas, post offices or large buildings with their own code. Codes beginning with 2 are assigned to the Mid-Atlantic and Southeast coast (D.C., Maryland, Virginia, West Virginia and the Carolinas). Learn more in our guide to how ZIP codes work or check any code with the ZIP code lookup.

What time zone is Adelphi in?

Adelphi is in the Eastern time zone, which is UTC−5 from Coordinated Universal Time in standard time (IANA zone America/New_York). The area observes daylight saving time, so clocks move forward in March and back in November. The nearest listed place in a different time zone is Fairfield Glade, TN, about 480 miles away, which gives a sense of how far the nearest zone boundary may be. Current local time: see the Eastern time hub. For the rules behind these zones, read US time zones explained.

Where is Adelphi located in Maryland?

Adelphi lies in the central part of Maryland, at 39.002° north latitude and 76.965° west longitude. The state capital, Annapolis, is about 25 miles to the east. The closest listed place in another state is Washington, DC, roughly 7 miles to the south, which shows how near Adelphi is to a state line. For big-city services, the nearest place with more than 100,000 people is Washington, DC, 7 miles to the south.

Which cities are near Adelphi, MD?

The closest listed place to Adelphi is Langley Park, MD, 1.2 miles to the southwest. Of the eight nearest places below, 4 are in the same county. Distances are straight-line (great-circle) miles measured between place centers; see how distance is calculated.

Which county is Adelphi in?

Adelphi is in Prince George's County, which has the Federal Information Processing Standards (FIPS) code 24033. The county contains 79 places in our data, 49 of which have their own page here and 30 smaller communities that appear only in county and state lists. Other places in the county include Bowie (58,643), Clinton (39,018), Chillum (35,557), College Park (32,163), South Laurel (28,683). Codes like this one help separate places that share a name; see the guide to counties and FIPS codes.

How far is Adelphi from major US cities?

Among six major hubs, Adelphi is closest to New York, NY at about 199 miles and farthest from Los Angeles, CA at about 2,305 miles in a straight line. Road distances are usually 10 to 30 percent longer. Try the distance calculator for any other pair.

Are there other places called Adelphi?

Yes. Our data lists 1 other place named Adelphi: Adelphi, OH (375). When you search for Adelphi, add the state or county so you land on the right one. This page covers the Adelphi in Prince George's County, Maryland.

Planning a move to Adelphi?

If you are weighing Adelphi, start with the practical numbers: how far it is from where you live, whether it changes your time zone, and how its size and density compare with your current city. Use the distance calculator to measure the trip from where you live. The radius search tool lists every place within any distance of it. Our checklist for comparing cities explains what to check next.

Where to go next

Population and density come from a compiled dataset and are estimates. They may differ from official Census Bureau counts. Verify important figures at census.gov.