Area Code 641

Iowa

Area code 641 serves Iowa, primarily Marshalltown, in the Central Time (CT) time zone. It was created from a split of area code 515.

Published: Verified against NANPA and FCC records

Split Area Code

This area code exists because its parent region ran low on available numbers: the parent territory was divided geographically, this code took over one part of it, and the parent kept serving the rest. Existing customers generally keep their numbers — only the code changes for the newly drawn region.

This area code was split from area code 515 (Des Moines).

In service since: 09-Jul-2000

Learn more about overlay and split area codes →

Demographics & Economics

Total Population
826,933
Population Density
27 people/sq mi
below U.S. average (U.S.: 95 people/sq mi)
Median Household Income
$70,781
below U.S. median (U.S.: $80,734)
Poverty Rate
11.3%
near U.S. average (U.S.: 12.5%)
Unemployment Rate
3.6%
below U.S. average (U.S.: 5.2%)
Education Attainment
Bachelor's Degree+
23.1%
below U.S. average (U.S.: 35.7%)
High School or Lower
39.8%

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 income ranking and density ranking.

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

Central Time (CT)
 
 

Prefix Utilization

Geographic Coverage

State

IA

Major Cities

  • Marshalltown
  • Mason City
  • Ottumwa
  • Newton
  • Oskaloosa
  • Pella
  • Grinnell
  • Fairfield
  • Clear Lake
  • Knoxville
  • Creston
  • Osceola
  • Centerville
  • Iowa Falls
  • Hampton
  • Chariton
  • Albia
  • Osage
  • New Hampton
  • Tama
  • Garner
  • Bloomfield
  • Belmond
  • Eldora

and 248 more cities

Area Code 641 geographic coverage map (light mode)

History

Area code 641 was created from a split of area code 515. It was introduced in 2000 as part of a geographic division to provide additional numbering resources.

Demographics

The estimated population served by area code 641 is approximately 826,933. The population density is 27 people per square mile, which is lower than the national average of 95. The median household income is $70,781, which is lower than the national median of $80,734. Approximately 23.1% of adults hold a bachelor's degree or higher, compared to the national rate of 35.7%. This rate is lower than the national average. The poverty rate stands at 11.3%, which is near the national rate of 12.5%.

County Coverage

Population-weighted county share based on aggregated ZCTA population (100% = total mapped population for area code 641).

CountyPopulationShare
Mahaska, IA75,2989.1%
Wapello, IA52,0316.3%
Cerro Gordo, IA51,2066.2%
Marshall, IA48,8725.9%
Jasper, IA47,0635.7%
Tama, IA44,1485.3%
Marion, IA42,0385.1%
Keokuk, IA40,9254.9%
Poweshiek, IA28,3493.4%
Floyd, IA27,0803.3%
Franklin, IA20,6832.5%
Chickasaw, IA19,5042.4%
Adair, IA17,5612.1%
Jefferson, IA17,3032.1%
Union, IA16,9622.1%
Hardin, IA16,6072.0%
Mitchell, IA16,5532.0%
Hancock, IA16,2732.0%
Winnebago, IA15,9111.9%
Wayne, IA14,8451.8%
Appanoose, IA14,6851.8%
Adams, IA14,6571.8%
Clarke, IA13,9941.7%
Davis, IA13,5341.6%
Worth, IA13,1321.6%
Monroe, IA12,3011.5%
Lucas, IA11,7771.4%
Warren, IA10,6721.3%
Ringgold, IA10,4941.3%
Guthrie, IA10,3671.3%
Decatur, IA9,7741.2%
Grundy, IA9,2841.1%
Butler, IA8,4651.0%
Madison, IA7,3530.9%
Story, IA5,9350.7%
Taylor, IA5,6530.7%
Wright, IA5,4340.7%
Howard, IA3,8080.5%
Bremer, IA3,7330.5%
Van Buren, IA3,6220.4%
Kossuth, IA1,9750.2%
Washington, IA1,5720.2%
Audubon, IA1,5220.2%
Dallas, IA1,3460.2%
Greene, IA8490.1%
Polk, IA8290.1%
Iowa, IA6430.1%
Cass, IA3110.0%

Area Code 641 Family Tree

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515641
1
Total Codes
0
Splits
0
Overlays
0
Max Depth

Area code 641 was originally assigned in 09-Jul-2000 to serve IA.

Call Context

Mixed urban-rural area

This area code spans a mix of urban centers and rural communities across IA, with Marshalltown as a primary city.

Nearby Area Codes

Area codes geographically closest to 641.

Area code 515 map card showing Des Moines (light mode)
515IADes MoinesCentral Time (CT)Geographic
Area code 319 map card showing Cedar Rapids (light mode)
319IACedar RapidsCentral Time (CT)Geographic
Area code 563 map card showing Davenport (light mode)
563IADavenportCentral Time (CT)Split
Area code 712 map card showing Sioux City (light mode)
712IASioux CityCentral Time (CT)Geographic

Other Area Codes in Iowa

Area codes that also serve Iowa, linked for easy comparison.