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:

Split Area Code

This area code was created by splitting an existing area code into separate geographic regions. When a split occurs, some customers in the original area code region are assigned the new area code.

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 →

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 94. The median household income is $67,955, which is lower than the national median of $78,538. Approximately 22.6% of adults hold a bachelor's degree or higher, compared to the national rate of 35.0%. This rate is lower than the national average. The poverty rate stands at 11.3%, which is near the national rate of 12.4%.

Demographics & Economics

Total Population
826,933
Population Density
27 people/sq mi
below U.S. average (U.S.: 94 people/sq mi)
Median Household Income
$67,955
below U.S. median (U.S.: $78,538)
Poverty Rate
11.3%
near U.S. average (U.S.: 12.4%)
Unemployment Rate
3.5%
below U.S. average (U.S.: 5.2%)
Education Attainment
Bachelor's Degree+
22.6%
below U.S. average (U.S.: 35.0%)
High School or Lower
40.2%

Statistics are population-weighted aggregations from Census ACS 5-year estimates.See Sources for details.

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

Time Zone

  • Central Time (CT)

Current Time

Central Time (CT)
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Area Code 641 geographic coverage map (light mode)

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%

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.

Frequently Asked Questions

Common questions about area code 641 and how phone numbering works.

Phone numbers assigned to area code 641 are tied to where they were originally provisioned — not the caller's current location. This code serving roughly 827k people covers Marshalltown in IA, so a number originally set up there will retain the 641 prefix even if the owner moves or uses VoIP. Mobile phones keep their original number when users relocate, and businesses often adopt local area codes to establish a regional presence.

Start by looking up the area code on this site to understand its geographic context — area code 641 is associated with Marshalltown in IA. For caller-specific details, use your carrier's caller ID features or check public directories. If you suspect fraud, you can report it to the FTC. To file a complaint about robocalls or spoofed numbers, visit the FCC Consumer Complaint Center. You can also register with the National Do Not Call Registry.

Area codes are sometimes "split" when an existing code runs out of available number combinations. In a split, the original territory is divided geographically, with each portion receiving its own area code. This area code was split from area code 515. See our guide on splits and overlays for details.