301 Area Code

The 301 area code is found in the state of Maryland, and spans 14 different Counties. Listed below are the 14 Counties that reside inside of the 301 area code. Included under the Counties are the cities within the given County.
Allegany County Maryland
Barton, Corriganville, Cumberland, Eckhart Mines, Ellerslie, Flintstone, Frostburg, Little Orleans, Lonaconing, Luke, Midland, Midlothian, Mount Savage, Oldtown, Pinto, Rawlings, Spring Gap, Westernport
Anne Arundel County Maryland
Annapolis, Arnold, Churchton, Crofton, Crownsville, Davidsonville, Deale, Edgewater, Fort George G Meade, Friendship, Galesville, Gambrills, Glen Burnie, Harwood, Laurel, Lothian, Millersville, Odenton, Riva, Severn, Shady Side, Tracys Landing, West River
Baltimore County Maryland
Catonsville, Monkton, Towson, Windsor Mill
Calvert County Maryland
Chesapeake Beach, Dunkirk, Huntingtown, Lusby, North Beach, Owings, Port Republic, Prince Frederick, Saint Leonard, Sunderland
Carroll County Maryland
Keymar, Sykesville, Taneytown, Union Bridge
Charles County Maryland
Bel Alton, Benedict, Bryans Road, Bryantown, Cobb Island, Faulkner, Hughesville, Indian Head, Ironsides, Issue, La Plata, Marbury, Mount Victoria, Nanjemoy, Newburg, Pomfret, Port Tobacco, Rock Point, Waldorf, Welcome, White Plains
Frederick County Maryland
Adamstown, Braddock Heights, Brunswick, Buckeystown, Emmitsburg, Frederick, Ijamsville, Jefferson, Knoxville, Ladiesburg, Libertytown, Middletown, Monrovia, Mount Airy, Myersville, New Market, New Midway, Point Of Rocks, Rocky Ridge, Sabillasville, Thurmont, Tuscarora, Walkersville, Woodsboro
Garrett County Maryland
Accident, Bittinger, Bloomington, Friendsville, Grantsville, Kitzmiller, Mc Henry, Oakland, Swanton
Howard County Maryland
Annapolis Junction, Clarksville, Columbia, Dayton, Dhs, Elkridge, Ellicott City, Fulton, Glenelg, Glenwood, Highland, Jessup, Laurel, Savage, West Friendship, Woodbine
Montgomery County Maryland
Ashton, Barnesville, Beallsville, Bethesda, Boyds, Brinklow, Brookeville, Burtonsville, Cabin John, Chevy Chase, Clarksburg, Damascus, Derwood, Dickerson, Gaithersburg, Garrett Park, Germantown, Glen Echo, Kensington, Montgomery Village, Olney, Poolesville, Potomac, Rockville, Sandy Spring, Silver Spring, Spencerville, Suburb Maryland Fac, Takoma Park, Washington Grove
Prince Georges County Maryland
Accokeek, Andrews Air Force Base, Aquasco, Beltsville, Bladensburg, Bowie, Brandywine, Brentwood, Capitol Heights, Cheltenham, Clinton, College Park, District Heights, Fort Washington, Glenn Dale, Greenbelt, Hyattsville, Lanham, Laurel, Mount Rainier, Oxon Hill, Riverdale, Southern Md Facility, Suitland, Temple Hills, Upper Marlboro
Saint Marys County Maryland
Abell, Avenue, Bushwood, California, Callaway, Chaptico, Charlotte Hall, Clements, Coltons Point, Compton, Dameron, Drayden, Great Mills, Helen, Hollywood, Leonardtown, Lexington Park, Loveville, Mechanicsville, Morganza, Park Hall, Patuxent River, Piney Point, Ridge, Saint Inigoes, Saint Marys City, Scotland, Tall Timbers, Valley Lee
Washington County Maryland
Big Pool, Boonsboro, Brownsville, Cascade, Cavetown, Chewsville, Clear Spring, Fairplay, Funkstown, Hagerstown, Hancock, Keedysville, Maugansville, Rohrersville, Saint James, Sharpsburg, Smithsburg, Williamsport
Baltimore City County Maryland
Baltimore