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Zip Code 45342 — Miamisburg, OH

45342 is a ZIP Code associated with Miamisburg, OH, located within Montgomery. 45342 ranks #3 out of 32 ZIP codes in Montgomery County by population (and #69 out of 1,232 in OH). The area supports an estimated population of 36,152 residents across Data Pending housing units, with a population density of 406.9 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (39.629430, -84.275450)

Data MetricLocal Statistic
Postal / Zip Code45342
Primary CityMiamisburg
State / ProvinceOH
CountyMontgomery
Total Population36,152
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density406.9 people/sq mi
TimezoneAmerica/New_York

How 45342 Compares

MetricZIP 45342Montgomery CountyOH State Average
Population36,152507,675 (Total)11,810,293 (Total)
Average ZIP IncomeData PendingN/AN/A
Population Density406.9 /sq mi----
County Pop Rank#3 of 32----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 45449Dayton3.1 mi19,066N/A
Zip 45439Dayton5.4 mi11,914N/A
Zip 45459Dayton5.9 mi28,553N/A
Zip 45066Springboro6.2 mi27,545N/A
Zip 45327Germantown6.5 mi9,315N/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 →