There are 37 zip codes in Montgomery County, Ohio. The most populated is 45424, located in Dayton. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
4542450,221Dayton
4545837,128Dayton
4534236,127Miamisburg
4545928,509Dayton
4541728,029Dayton
4542926,523Dayton
4542023,600Dayton
4544022,256Dayton
4532221,540Englewood
4541420,423Dayton
4540619,954Dayton
4540519,059Dayton
4544919,032Dayton
4541017,345Dayton
4541916,852Dayton
4540915,788Dayton
4543215,024Dayton
4537714,272Vandalia
4542613,591Dayton
4540313,002Dayton
4543412,810Dayton
4541512,601Dayton
4543912,591Dayton
4530911,789Brookville
4540210,438Dayton
4540410,380Dayton
453278,916Germantown
454307,105Dayton
453456,553New Lebanon
454165,547Dayton
453154,402Clayton
453252,473Farmersville
45354632Phillipsburg
45428286Dayton
45469206Dayton
45435177Dayton
45423Dayton
showing: 37 rows

Zip Codes in Montgomery County, Ohio by Population (2024)