ZIP code · Carroll · Iowa · United States

ZIP code 51401 — Carroll

ZIP code 51401 serves Carroll, Iowa.

Postal code
51401
Single source Value from one source, not cross-checked.
City
Carroll
County
Carroll FIPS 19027
State
Iowa
Country
United States
Coordinates
42.0720, -94.8667 — precision precise (locality)
View on OpenStreetMap
Population
12,113 (ZCTA, ACS 5-year)
Population density
72 / sq mi
Land area
168.6 sq mi (436.6 km²) (ZCTA, ACS 5-year)
Median household income
$64,458
Per-capita income
$37,382
Median age
43.1
Households
5,210
Housing units
5,576
Median home value
$192,100
Median gross rent
$720 / month
Congressional district
IA-4 (119th Congress)
USDA hardiness zone
5a (-20 to -15 °F)
Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
Time zone
America/Chicago (UTC−6 / UTC−5 DST)
Area code
712
Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.

Climate — monthly normals

Warmest month Jul (avg high 84°F), coldest Jan (avg low 10°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F283346607181848276634633
Avg low °F101425364960646152402716
Precip in0.91.11.93.44.55.14.44.13.02.71.41.4

NOAA 1991–2020 climate normals from the nearest station: CARROLL (1.0 mi) · NOAA NCEI

Places in ZIP 51401

Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology

About this page

US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.

GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page