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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

Ocoee (FL)

Ocoee (FL)

Ocoee is a city located in the state of Florida, primarily within Orange County. Established in the …

Odenton (MD)

Odenton (MD)

Odenton, Maryland, is an unincorporated community located in Anne Arundel County, approximately 25 m…

Oildale (CA)

Oildale (CA)

Oildale, California, is an unincorporated community located in Kern County, just north of Bakersfiel…

Okemos (MI)

Okemos (MI)

Okemos, Michigan, is an unincorporated community located within Meridian Township in Ingham County. …

Oklahoma City (OK)

Oklahoma City (OK)

Oklahoma City, the capital of the state of Oklahoma, serves as a critical hub in the central United …

Olathe (KS)

Olathe (KS)

Olathe, located in Johnson County, Kansas, serves as one of the larger cities in the Kansas City met…

Olive Branch (MS)

Olive Branch (MS)

Olive Branch, located in DeSoto County, Mississippi, is a city with a rich historical background dat…

Olney (MD)

Olney (MD)

Olney is a census-designated place located in Montgomery County, Maryland, with a population of appr…

Olympia (WA)

Olympia (WA)

Olympia, the capital city of Washington State, is located at the southern end of Puget Sound, approx…

Omaha (NE)

Omaha (NE)

Omaha, Nebraska, located in the Midwestern United States, serves as the largest city in the state an…

Ontario (CA)

Ontario (CA)

Ontario, California, located in San Bernardino County, is a city with a rich historical background a…

Opelika (AL)

Opelika (AL)

Opelika, located in Lee County, Alabama, serves as a significant urban center in the East Alabama re…

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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.