661 Area Code — California
661 is a North American Numbering Plan area code for California, the United States. It covers about 1,433,854 people in 37 towns and 79 ZIP codes, including Bakersfield, Lancaster and Palmdale.
| Field | Value |
|---|---|
| Area code | 661 |
| Country | United States (+1) |
| State / province | California |
| Type | Standalone (no other NANP code covers the same towns) |
| Time zone | Pacific |
| Population covered | 1,433,854 |
| Towns covered | 37 |
| ZIP codes | 79 |
| Approx. centre | 35.050, -118.727 |
Where area code 661 is used
Area code 661 is assigned to California, the United States, inside the North American Numbering Plan. Numbers in the code are written (661) NXX-XXXX at home and +1 661 NXX-XXXX when dialled from outside Canada and the United States. Since the NANP moved to 10-digit dialling you must always include the area code, even for a local call.
Towns and cities in area code 661
The 37 towns below are the largest in the 661 footprint, ranked by population. Every one of them links to its own page with the full list of area codes and ZIP codes for that town.
| Town | County | Population | ZIP codes |
|---|---|---|---|
| Bakersfield | Kern County | 591,916 | 22 |
| Lancaster | Los Angeles County | 194,251 | 6 |
| Palmdale | Los Angeles County | 184,695 | 6 |
| Santa Clarita | Los Angeles County | 63,281 | 5 |
| Valencia | Los Angeles County | 63,080 | 3 |
| Delano | Kern County | 54,556 | 2 |
| Tehachapi | Kern County | 34,363 | 2 |
| Wasco | Kern County | 27,407 | 1 |
| Castaic | Los Angeles County | 26,478 | 2 |
| Shafter | Kern County | 24,024 | 1 |
| Stevenson Ranch | Los Angeles County | 22,582 | 1 |
| Rosamond | Kern County | 22,119 | 1 |
Counties covered
| County | ZIP codes |
|---|---|
| Kern County | 46 |
| Los Angeles County | 28 |
| Tulare County | 4 |
| Santa Barbara County | 1 |
Nearby area codes
How to dial area code 661
- Within North America: 661 + 7-digit number (661-NXX-XXXX). The leading 1 is optional on a mobile phone and required on most landlines for long-distance.
- From abroad: your country's international prefix, then 1, then 661, then the 7-digit number — for example 00 1 661 NXX-XXXX from most of Europe.
Frequently asked questions
What area code is 661?
661 is a North American Numbering Plan area code assigned to California, the United States. It covers about 1,433,854 people in 37 towns.
Is 661 a US or Canadian area code?
661 is a United States area code. Canada and the United States share the +1 country code, so both are part of the same numbering plan.
What time zone is area code 661 in?
Area code 661 is in the Pacific time zone.
Do I have to dial 10 digits?
Yes. Every NANP call now requires the area code plus the seven-digit number, even for a local call.