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Zip Code 45812 — Alger, OH

45812 is a ZIP Code associated with Alger, OH, located within Hardin. The postal region supports an estimated population of 2,027 residents across Data Pending housing units, with a population density of 20.2 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (40.683410, -83.813500)

Data MetricLocal Statistic
Postal / Zip Code45812
Primary CityAlger
State / ProvinceOH
CountyHardin
Total Population2,027
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density20.2 people/sq mi
TimezoneAmerica/New_York

How 45812 Compares

MetricZIP 45812Hardin CountyOH State Average
Population2,02734,15711,810,293
Median IncomeData PendingN/AN/A
Population Density20.2 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 45859McGuffey1.6 mi384N/A
Zip 45850Harrod5.7 mi3,559N/A
Zip 45810Ada6.5 mi7,449N/A
Zip 43346Roundhead7.6 mi238N/A
Zip 45835Dola7.9 mi449N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →