ZIP code · Defiance · Ohio · United States

ZIP code 43512 — Defiance

ZIP code 43512 serves Defiance, Ohio.

Postal code
43512
Single source Value from one source, not cross-checked.
City
Defiance
County
Defiance FIPS 39039
State
Ohio
Country
United States
Coordinates
41.2799, -84.3626 — precision precise (locality)
View on OpenStreetMap
Population
27,894 (ZCTA, ACS 5-year)
Population density
128 / sq mi
Land area
217.7 sq mi (563.8 km²) (ZCTA, ACS 5-year)
Median household income
$72,082
Per-capita income
$36,481
Median age
43.6
Households
11,644
Housing units
12,665
Median home value
$149,300
Median gross rent
$851 / month
Congressional districts
OH-9 (also OH-5) (119th Congress)
USDA hardiness zone
6a (-10 to -5 °F)
Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
Time zone
America/New_York (UTC−5 / UTC−4 DST)
Area code
419
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 85°F), coldest Jan (avg low 18°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F323646607181858277634937
Avg low °F182028385060636254433224
Precip in2.62.22.53.74.33.63.73.53.32.93.02.5

NOAA 1991–2020 climate normals from the nearest station: DEFIANCE (1.2 mi) · NOAA NCEI

Places in ZIP 43512

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