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Where am ILOCATED

Montgomery County, Ohio

Montgomery County, Ohio, has 539,598 residents (July 2025 estimate). Its county seat is Dayton. It uses Eastern Time and covers 461 sq mi (1,195 km²) of land.

ColumbusClevelandCincinnati
Montgomery County in Ohio
Greene CountyPreble CountyDaytonKetteringHuber HeightsCentervilleRiverside
Montgomery County and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Resident population, July 2025
539,598
Land area
461 sq mi (1,195 km²)
County seat or government
Dayton
Time zone
Eastern TimeUTC-05:00 in January; UTC-04:00 in July
Median household income
$66,139 ± $1,144
Median home value
$180,900 ± $2,949
Median rent, with utilities
$1,026 ± $16
Homes lived in by their owners
62.5% ± 0.7 points
County type
County
Metro or micro area
Dayton-Kettering-Beavercreek, OH metro areaCentral county
Water area
2.89 sq mi (7.49 km²)
State
Ohio
County code (FIPS)
39113
Coordinates (central point)
39.753736, -84.290591
Open this point in the location finder

These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.

Time zones in Montgomery County

Time zoneLocal time and UTC offsetNext clock change
Eastern TimeAmerica/New_YorkUTC-05:00 in January; UTC-04:00 in July. Enable JavaScript for the live clock.Enable JavaScript for upcoming changes.

Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.

ZIP Code areas, largest first

  1. 4542450,725 people
  2. 4545838,712 people
  3. 4534236,152 people
  4. 4500532,251 people
  5. 4545928,553 people
  6. 4541728,186 people
  7. 4543127,951 people
  8. 4504227,652 people
  9. 4506627,545 people
  10. 4542926,347 people
  11. 4542024,411 people
  12. 4537122,865 people
All 42
  1. 4544022,358 people
  2. 4541421,167 people
  3. 4532220,884 people
  4. 4540619,991 people
  5. 4544919,066 people
  6. 4540518,955 people
  7. 4541917,008 people
  8. 4534416,979 people
  9. 4540915,293 people
  10. 4543215,055 people
  11. 4537714,888 people
  12. 4541014,694 people
  13. 4542614,114 people
  14. 4540313,608 people
  15. 4541512,465 people
  16. 4543911,914 people
  17. 4530911,876 people
  18. 454049,826 people
  19. 454029,407 people
  20. 453279,315 people
  21. 453456,110 people
  22. 454165,640 people
  23. 453815,626 people
  24. 453154,905 people
  25. 453252,470 people
  26. 45354553 people
  27. 45378539 people
  28. 45428272 people
  29. 45469168 people
  30. 454230 people

42 ZIP Code areas overlap Montgomery County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.

Official county information

Montgomery County government website ↗ is the next stop for county offices, tax, voting, jury and records information. A geographic lookup cannot determine eligibility, tax liability or a court obligation.

Townships in Montgomery County, largest first

  1. Washington Township62,601 people
  2. Miami Township52,159 people
  3. Harrison Township21,751 people
  4. Clay Township8,835 people
  5. German Township8,764 people
  6. Butler Township8,261 people
  7. Union City Township6,889 people
  8. Jackson Township6,071 people
  9. Jefferson Township5,901 people
  10. Perry Township5,842 people
  11. Wayne Township0 people

People counts are American Community Survey 2020–2024 5-year estimates. All townships in Ohio, by county

School districts in Montgomery County, largest first

  1. Dayton City School District146,464 people
  2. Centerville City School District62,310 people
  3. Beavercreek City School District58,128 people
  4. Kettering City School District57,391 people
  5. Fairborn City School District43,056 people
  6. Huber Heights City School District41,870 people
  7. Miamisburg City School District38,989 people
  8. Springboro Community City School District37,060 people
  9. Northmont City School District35,202 people
  10. West Carrollton City School District29,384 people
  11. Vandalia-Butler City School District24,096 people
  12. Mad River Local School District20,863 people
All 22
  1. Trotwood-Madison City School District19,084 people
  2. Valley View Local School District10,626 people
  3. Northridge Local School District (Montgomery County)10,598 people
  4. Carlisle Local School District10,456 people
  5. Preble Shawnee Local School District9,352 people
  6. Oakwood City School District9,348 people
  7. Brookville Local School District9,117 people
  8. New Lebanon Local School District7,049 people
  9. Tri-County North Local School District5,816 people
  10. Jefferson Township Local School District5,323 people

Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.

Cities, towns and communities, largest first

These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.

  1. Dayton, Ohio (city)136,579 people
  2. Kettering, Ohio (city)57,206 people
  3. Huber Heights, Ohio (city)43,455 people
  4. Centerville, Ohio (city)25,205 people
  5. Riverside, Ohio (city)24,435 people
  6. Trotwood, Ohio (city)23,041 people
  7. Springboro, Ohio (city)19,980 people
  8. Miamisburg, Ohio (city)19,948 people
  9. Vandalia, Ohio (city)15,053 people
  10. Englewood, Ohio (city)13,356 people
  11. Clayton, Ohio (city)13,277 people
  12. West Carrollton, Ohio (city)12,976 people
All 25
  1. Shiloh, Ohio (CDP)10,526 people
  2. Oakwood, Ohio (city)9,458 people
  3. Union, Ohio (city)7,037 people
  4. Moraine, Ohio (city)6,536 people
  5. Germantown, Ohio (city)5,825 people
  6. Brookville, Ohio (city)5,779 people
  7. Carlisle, Ohio (city)5,543 people
  8. New Lebanon, Ohio (village)4,169 people
  9. Fort McKinley, Ohio (CDP)3,508 people
  10. Drexel, Ohio (CDP)1,751 people
  11. Farmersville, Ohio (village)1,079 people
  12. Verona, Ohio (village)653 people
  13. Phillipsburg, Ohio (village)406 people

Bordering areas, nearest first

Distances are straight lines between map points.

  1. Preble County, Ohio19 mi west
  2. Miami County, Ohio21 mi north
  3. Greene County, Ohio22 mi east
  4. Warren County, Ohio24 mi south
  5. Butler County, Ohio26 mi southwest
  6. Clark County, Ohio29 mi northeast
  7. Darke County, Ohio31 mi northwest

Before using this answer on a form

Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.

Find the county where you are now, check its ZIP area, or check the time zone where you are.

See this county on Census.gov ↗

Areas that only touch the edge

These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.