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  2. List of counties in Maryland - Wikipedia

    en.wikipedia.org/wiki/List_of_counties_in_Maryland

    There are 23 counties and one independent city in the U.S. state of Maryland. Though formally an independent city rather than a county, the City of Baltimore is considered the equal of a county for most purposes and is functionally a county-equivalent in most respects. Many of the counties in Maryland were named for relatives of the Barons ...

  3. List of Maryland area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Maryland_area_codes

    The blue area is assigned area codes 301, 240, and 227; the red area is area codes 410, 443 and 667. The state of Maryland is served by the following area codes: Area codes. Numbering plan area. 227.

  4. Potomac, Maryland - Wikipedia

    en.wikipedia.org/wiki/Potomac,_Maryland

    Area code (s) 301, 240. FIPS code. 24-63300. GNIS feature ID. 2389701 [2] Potomac (listen ⓘ) is an unincorporated community and census-designated place in Montgomery County, Maryland, United States. As of the 2020 census, it had a population of 47,018. [3] It is named after the nearby Potomac River.

  5. College Park, Maryland - Wikipedia

    en.wikipedia.org/wiki/College_Park,_Maryland

    2390578. Website. www.collegeparkmd.gov. College Park is a city in Prince George's County, Maryland, United States, [ 3 ] located approximately four miles (6.4 km) from the northeast border of Washington, D.C. Its population was 34,740 at the 2020 United States census. It is the home of the University of Maryland, College Park.

  6. National Harbor, Maryland - Wikipedia

    en.wikipedia.org/wiki/National_Harbor,_Maryland

    2426650/2583665. Website. Official website. National Harbor is a census-designated place (CDP) in Prince George's County, Maryland, United States, located along the Potomac River near the Woodrow Wilson Bridge and just south of Washington, D.C. It originated as a 300-acre (1.2 km 2) multi-use waterfront development.

  7. Clarksville, Maryland - Wikipedia

    en.wikipedia.org/wiki/Clarksville,_Maryland

    ZIP. 21029. Area code (s) 410 & 443. Clarksville is an unincorporated community in Howard County, Maryland; the second highest-earning county in the United States according to the U.S. Census Bureau. [1] The community is named for William Clark, a farmer who owned much of the land on which the community now lies and served as a postal stop that ...

  8. Brandywine, Maryland - Wikipedia

    en.wikipedia.org/wiki/Brandywine,_Maryland

    Website. www.brandywinemd.com. Brandywine is the name of an unincorporated area in Prince George's County, Maryland, United States, that refers both to a census-designated place (CDP) and a zip code area which is much larger (20613), whose areas overlap. [2] The population of Brandywine at the 2020 U.S. Census was 10,550 for the CDP, [3] and ...

  9. Area codes 301, 240, and 227 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_301,_240,_and_227

    Area code 301 was the first area code for all of Maryland, from 1947, when the area code system was created, until 1991, when everything from Baltimore eastward split off as area code 410. In 1997, area code 240 was added as an overlay area code for the 301 territory. On June 14, 2023, a third overlay code, 227, was added to provide more ...