Maryland Area Codes — 6 Codes
Maryland has 6 North American Numbering Plan area codes, covering about 18,178,737 people. The table lists each code with its largest towns, population and overlaps.
All area codes in Maryland
| Area code | Largest towns | Population | ZIP codes | Overlaps |
|---|---|---|---|---|
| 410 | Baltimore, Laurel, Columbia | 3,326,477 | 324 | 667, 443 |
| 667 | Baltimore, Laurel, Columbia | 3,326,477 | 324 | 410, 443 |
| 443 | Baltimore, Laurel, Columbia | 3,254,789 | 279 | 410, 667 |
| 240 | Silver Spring, Hyattsville, Frederick | 2,823,102 | 265 | 301, 227 |
| 301 | Silver Spring, Hyattsville, Frederick | 2,823,102 | 265 | 240, 227 |
| 227 | Silver Spring, Hyattsville, Frederick | 2,624,790 | 235 | 240, 301 |
Largest cities in Maryland
Baltimore 410, 443, 667Silver Spring 227, 240, 301Hyattsville 227, 240, 301Frederick 227, 240, 301Rockville 227, 240, 301Gaithersburg 227, 240, 301Laurel 227, 240, 301, 410, 443, 667Upper Marlboro 227, 240, 301Bowie 227, 240, 301Hagerstown 227, 240, 301Columbia 410, 443, 667Glen Burnie 410, 443, 667Annapolis 410, 443, 667Ellicott City 410, 443, 667Germantown 227, 240, 301Bethesda 227, 240, 301Waldorf 227, 240, 301Salisbury 410, 443, 667Bel Air 410, 443, 667Parkville 410, 443, 667Owings Mills 410, 443, 667Pasadena 410, 443, 667Westminster 410, 443, 667Dundalk 410, 443, 667Fort Washington 227, 240, 301Potomac 227, 240, 301Catonsville 410, 443, 667Gwynn Oak 410, 443, 667Towson 410, 443, 667Elkton 410, 443, 667Essex 410, 443, 667Middle River 410, 443, 667Lanham 227, 240, 301College Park 227, 240, 301Capitol Heights 227, 240, 301Cumberland 227, 240, 301Temple Hills 227, 240, 301Nottingham 410, 443, 667Sykesville 410, 443, 667Lutherville Timonium 410, 443, 667
Frequently asked questions
How many area codes does Maryland have?
Maryland uses 6 area codes.
What is the main area code in Maryland?
410 covers the largest population in Maryland.
How do I find the area code for a town?
Open the town in the city list above; each town page lists every area code assigned to it.