ZIP code · Northboro · Iowa · United States

ZIP code 51647 — Northboro

ZIP code 51647 serves Northboro, Iowa.

Postal code
51647
Single source Value from one source, not cross-checked.
City
Northboro
County
Page FIPS 19145
State
Iowa
Country
United States
Coordinates
40.6127, -95.3096 — precision precise (locality)
View on OpenStreetMap
Population
154 (ZCTA, ACS 5-year)
Population density
6 / sq mi
Land area
25 sq mi (64.7 km²) (ZCTA, ACS 5-year)
Per-capita income
$40,446
Median age
45.5
Households
87
Housing units
90
Congressional districts
IA-3 (also IA-4) (119th Congress)
USDA hardiness zone
5b (-15 to -10 °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 87°F), coldest Jan (avg low 14°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F333952647483878579665138
Avg low °F141829405363676455422919
Precip in0.91.22.13.36.25.54.43.83.02.81.81.4

NOAA 1991–2020 climate normals from the nearest station: SHENANDOAH (11.2 mi) · NOAA NCEI

Places in ZIP 51647

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