Area Code 712
Iowa
Area code 712 serves Iowa, primarily Sioux City, in the Central Time (CT) time zone. It has served the region since 01-Jan-1947.
Demographics & Economics
- Total Population
- 867,981
- Population Density
- 28 people/sq mibelow U.S. average (U.S.: 93 people/sq mi)
- Median Household Income
- $70,147near U.S. median (U.S.: $75,144)
- Poverty Rate
- 10.2%below U.S. average (U.S.: 11.5%)
- Unemployment Rate
- 3.1%below U.S. average (U.S.: 3.6%)
- Education Attainment
- Bachelor's Degree+23.5%below U.S. average (U.S.: 33.7%)High School or Lower37.5%
Statistics are population-weighted aggregations from Census ACS 5-year estimates. Population figures are approximate — see Sources & Methodology for details on how area code populations are derived.
See how this area code compares to all US area codes in the Statistics dashboard.
Time Zone
- Central Time (CT)
NANPA Relief Status
According to the latest NANPA analysis (July 2026), this area code is not currently listed as exhausting within the next 36 months. No relief planning is in progress for this NPA.
Source: NANPA NPA Relief Planning Reports · See all relief planning statuses
Current Time
Prefix Utilization
Geographic Coverage
State
IA
Major Cities
- Sioux City
- Council Bluffs
- Spencer
- Storm Lake
- Le Mars
- Carroll
- Sioux Center
- Denison
- Atlantic
- Estherville
- Red Oak
- Spirit Lake
- Sheldon
- Clarinda
- Cherokee
- Glenwood
- Sergeant Bluff
- Shenandoah
- Harlan
- Rock Valley
- Carter Lake
- Emmetsburg
- Milford
- Onawa
and 253 more cities
Demographics
The estimated population served by area code 712 is approximately 867,981. The population density is 28 people per square mile, which is lower than the national average of 93. The median household income is $70,147, which is near the national median of $75,144. Approximately 23.5% of adults hold a bachelor's degree or higher, compared to the national rate of 33.7%. This rate is lower than the national average. The poverty rate stands at 10.2%, which is lower than the national rate of 11.5%.
History
Area code 712 is one of the original area codes established in 1947 when the North American Numbering Plan (NANP) was created.
County Coverage
Population-weighted county share based on aggregated ZCTA population (100% = total mapped population for area code 712).
| County | Population | Share |
|---|---|---|
| Woodbury, IA | 112,654 | 13.0% |
| Pottawattamie, IA | 110,387 | 12.7% |
| Sioux, IA | 60,886 | 7.0% |
| Mills, IA | 53,540 | 6.2% |
| Plymouth, IA | 38,092 | 4.4% |
| Shelby, IA | 30,511 | 3.5% |
| Sac, IA | 28,179 | 3.2% |
| Lyon, IA | 27,177 | 3.1% |
| Crawford, IA | 26,839 | 3.1% |
| Dickinson, IA | 25,926 | 3.0% |
| Buena Vista, IA | 25,823 | 3.0% |
| Carroll, IA | 25,272 | 2.9% |
| Page, IA | 24,040 | 2.8% |
| Clay, IA | 23,603 | 2.7% |
| Cherokee, IA | 20,477 | 2.4% |
| Audubon, IA | 19,983 | 2.3% |
| Harrison, IA | 19,467 | 2.2% |
| O'Brien, IA | 18,989 | 2.2% |
| Cass, IA | 18,081 | 2.1% |
| Monona, IA | 14,045 | 1.6% |
| Calhoun, IA | 13,551 | 1.6% |
| Montgomery, IA | 13,419 | 1.5% |
| Fremont, IA | 12,536 | 1.4% |
| Ida, IA | 12,011 | 1.4% |
| Emmet, IA | 11,615 | 1.3% |
| Taylor, IA | 11,531 | 1.3% |
| Palo Alto, IA | 11,370 | 1.3% |
| Pocahontas, IA | 10,976 | 1.3% |
| Osceola, IA | 10,621 | 1.2% |
| Jackson, MN | 8,561 | 1.0% |
| Guthrie, IA | 8,023 | 0.9% |
| Union, SD | 5,729 | 0.7% |
| Greene, IA | 3,909 | 0.5% |
| Adams, IA | 2,997 | 0.3% |
| Webster, IA | 2,461 | 0.3% |
| Atchison, MO | 1,445 | 0.2% |
| Adair, IA | 1,277 | 0.1% |
| Kossuth, IA | 1,190 | 0.1% |
| Burt, NE | 788 | 0.1% |
Area Code 712 Family Tree
Area code 712 is an original area code with no splits or overlays. It has been in service since 01-Jan-1947.
Call Context
This area code spans a mix of urban centers and rural communities across IA, with Sioux City as a primary city.
Nearby Area Codes
Area codes geographically closest to 712.
Other Area Codes in Iowa
Area codes that also serve Iowa, linked for easy comparison.