Home > OH > Highland County > Greenfield > Zip 45123

Zip Code 45123 — Greenfield, OH

45123 is a ZIP Code associated with Greenfield, OH, located within Highland. The postal region supports an estimated population of 8,740 residents across Data Pending housing units, with a population density of 31.6 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (39.348700, -83.388660)

Data MetricLocal Statistic
Postal / Zip Code45123
Primary CityGreenfield
State / ProvinceOH
CountyHighland
Total Population8,740
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density31.6 people/sq mi
TimezoneAmerica/New_York

How 45123 Compares

MetricZIP 45123Highland CountyOH State Average
Population8,74042,56611,810,293
Median IncomeData PendingN/AN/A
Population Density31.6 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 45681South Salem8.1 mi1,451N/A
Zip 45135Leesburg8.5 mi5,291N/A
Zip 45628Frankfort10.6 mi5,999N/A
Zip 45612Bainbridge11.1 mi4,933N/A
Zip 45132Highland11.3 mi87N/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 →