ZIP code · Ionia · Iowa · United States

ZIP code 50645 — Ionia

ZIP code 50645 serves Ionia, Iowa.

Postal code
50645
Single source Value from one source, not cross-checked.
City
Ionia
County
Chickasaw FIPS 19037
State
Iowa
Country
United States
Coordinates
43.0403, -92.4865 — precision precise (locality)
View on OpenStreetMap
Population
1,301 (ZCTA, ACS 5-year)
Population density
15 / sq mi
Land area
85.6 sq mi (221.8 km²) (ZCTA, ACS 5-year)
Median household income
$61,563
Per-capita income
$32,849
Median age
57.4
Households
623
Housing units
731
Median home value
$113,000
Median gross rent
$806 / month
Congressional district
IA-2 (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
641 (from the nearest rate centre)
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 81°F), coldest Jan (avg low 6°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F232841566878817973594329
Avg low °F61022344757605849372412
Precip in1.31.42.44.25.06.65.04.63.82.72.11.7

NOAA 1991–2020 climate normals from the nearest station: NEW HAMPTON (8.8 mi) · NOAA NCEI

Places in ZIP 50645

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