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USA Cities & Listing Area Codes

Welcome to our directory of area codes by city across the United States. This page allows you to quickly locate the area code for any U.S. city, providing an easy reference for those looking to identify or verify phone codes. Browse through the cities listed below to find detailed area code information tailored to each location.

USA Cities & Area Codes

Oak Park (MI)

Oak Park (MI)

Oak Park, Michigan, located within Oakland County, is a suburb of Detroit, characterized by its cult…

Oak Ridge (FL)

Oak Ridge (FL)

Oak Ridge is a census-designated place located in Orange County, Florida, with a population of appro…

Oak Ridge (TN)

Oak Ridge (TN)

Oak Ridge, Tennessee, located about 25 miles west of Knoxville, has a population of approximately 30…

Oakdale (MN)

Oakdale (MN)

**Oakdale, Minnesota** Oakdale, located in Washington County, is a suburb of St. Paul, positioned a…

Oakland (CA)

Oakland (CA)

Oakland, California, located in Alameda County, is the eighth-largest city in the state and serves a…

Oakland Park (FL)

Oakland Park (FL)

Oakland Park, located in Broward County, Florida, is a city that has evolved significantly since its…

Oakley (CA)

Oakley (CA)

Oakley, California, located in Contra Costa County, is a city with a rich agricultural heritage, inc…

Oakton (VA)

Oakton (VA)

Oakton, Virginia, is a suburban community located in Fairfax County, approximately 20 miles west of …

Oakville (MO)

Oakville (MO)

Oakville, Missouri, situated in St. Louis County, is an unincorporated community known for its subur…

Ocala (FL)

Ocala (FL)

Ocala, Florida, located in Marion County, is known for its rich history and vibrant equestrian cultu…

Oceanside (CA)

Oceanside (CA)

Oceanside, located in San Diego County, California, is a coastal city with a rich history and vibran…

Oceanside (NY)

Oceanside (NY)

Oceanside, located in Nassau County on Long Island, New York, is an unincorporated community within …

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How do I find the area code for a specific U.S. city?
Simply scroll through our city listings or use the search feature to find the city you’re looking for. Each city entry includes the area code(s) that correspond to that location.
Do some cities have multiple area codes?
Yes, larger cities or those in regions with high demand often have multiple area codes. This allows for a greater number of phone numbers within the same geographic area and helps accommodate growth in highly populated locations.
Why might a city’s area code change or gain additional codes?
Area codes are added or changed as cities grow and require more phone numbers. This often results in overlay codes or splits, where new area codes are introduced alongside existing ones to ensure adequate numbering for all residents and businesses.