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Zip Code 45431 — Dayton, OH

ZIP Code 45431 is associated with Dayton, OH, in Greene County. The listed population estimate is 27,951; estimated density is 919.8 people per square mile. Among records with population estimates, it ranks #3 of 17 in Greene County and #124 of 1,215 in OH.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (39.764880, -84.080120)

Data MetricLocal Statistic
Postal / Zip Code45431
Primary CityDayton
State / ProvinceOH
CountyGreene
Total Population27,951
Population Density919.8 people/sq mi
TimezoneAmerica/New_York

How 45431 Compares

MetricZIP 45431Greene County recordsOH records
Population estimate27,951204,272 (sum)11,810,293 (sum)
Population Density919.8 /sq mi----
County population rank#3 of 17----
State population rank#124 of 1,215----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in OH

ZIP CodeCityDistancePopulation estimate
ZIP 45435Dayton1.4 mi134
ZIP 45432Dayton1.8 mi15,055
ZIP 45430Dayton3.6 mi7,371
ZIP 45433Dayton3.7 mi1,508
ZIP 45403Dayton3.7 mi13,608

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 →