319 Area Code — Iowa
319 is a North American Numbering Plan area code for Iowa, the United States. It covers about 796,029 people in 166 towns and 189 ZIP codes, including Cedar Rapids, Iowa City and Waterloo.
| Field | Value |
|---|---|
| Area code | 319 |
| Country | United States (+1) |
| State / province | Iowa |
| Type | Standalone (no other NANP code covers the same towns) |
| Time zone | Central |
| Population covered | 796,029 |
| Towns covered | 166 |
| ZIP codes | 189 |
| Approx. centre | 41.790, -91.829 |
Where area code 319 is used
Area code 319 is assigned to Iowa, the United States, inside the North American Numbering Plan. Numbers in the code are written (319) NXX-XXXX at home and +1 319 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 319
The 166 towns below are the largest in the 319 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 |
|---|---|---|---|
| Cedar Rapids | Linn County | 145,496 | 14 |
| Iowa City | Johnson County | 84,923 | 6 |
| Waterloo | Black Hawk County | 69,066 | 4 |
| Cedar Falls | Black Hawk County | 43,867 | 2 |
| Marion | Linn County | 42,706 | 1 |
| Burlington | Des Moines County | 27,341 | 1 |
| Coralville | Johnson County | 23,250 | 1 |
| North Liberty | Johnson County | 23,097 | 1 |
| Fort Madison | Lee County | 12,677 | 1 |
| Waverly | Bremer County | 12,673 | 1 |
| Mount Pleasant | Henry County | 12,428 | 1 |
| Keokuk | Lee County | 11,711 | 1 |
Counties covered
| County | ZIP codes |
|---|---|
| Linn County | 30 |
| Benton County | 16 |
| Johnson County | 15 |
| Black Hawk County | 14 |
| Iowa County | 13 |
| Lee County | 13 |
| Henry County | 9 |
| Buchanan County | 8 |
| Des Moines County | 8 |
| Bremer County | 7 |
| Butler County | 6 |
| Washington County | 6 |
Nearby area codes
How to dial area code 319
- Within North America: 319 + 7-digit number (319-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 319, then the 7-digit number — for example 00 1 319 NXX-XXXX from most of Europe.
Frequently asked questions
What area code is 319?
319 is a North American Numbering Plan area code assigned to Iowa, the United States. It covers about 796,029 people in 166 towns.
Is 319 a US or Canadian area code?
319 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 319 in?
Area code 319 is in the Central 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.