ZIP code · Middletown · Ohio · United States
ZIP code 45042 — Middletown
ZIP code 45042 serves Middletown, Ohio.
- Postal code
- 45042Single source Value from one source, not cross-checked.
- City
- Middletown
- County
- Butler FIPS 39017
- State
- Ohio
- Country
- United States
- Coordinates
- 39.5321, -84.3896 — precision precise (locality)
View on OpenStreetMap - Population
- 28,217 (ZCTA, ACS 5-year)
- Population density
- 574 / sq mi
- Land area
- 49.2 sq mi (127.4 km²) (ZCTA, ACS 5-year)
- Median household income
- $66,732
- Per-capita income
- $36,731
- Median age
- 41.1
- Households
- 11,682
- Housing units
- 12,324
- Median home value
- $192,400
- Median gross rent
- $950 / month
- Congressional district
- OH-8 (119th Congress)
- USDA hardiness zone
- 6b (-5 to 0 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/New_York (UTC−5 / UTC−4 DST)
Tools: compare 45042 with another ZIP · ZIPs within 25 miles · distance from 45042
Map of ZIP code 45042
Climate — monthly normals
Warmest month Jul (avg high 86°F), coldest Jan (avg low 20°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 38 | 42 | 52 | 65 | 74 | 82 | 86 | 85 | 79 | 67 | 53 | 43 |
| Avg low °F | 20 | 22 | 30 | 39 | 51 | 60 | 64 | 61 | 53 | 41 | 32 | 26 |
| Precip in | 3.3 | 2.5 | 3.5 | 4.6 | 4.4 | 4.5 | 4.3 | 2.9 | 2.9 | 3.2 | 3.0 | 3.3 |
NOAA 1991–2020 climate normals from the nearest station: FRANKLIN (4.0 mi) · NOAA NCEI
Places in ZIP 45042
- 15 schools
- 1 colleges & universities
- 16 restaurants & cafés
- 1 bars & pubs
- 20 parks
- 25 playgrounds
- 3 gyms & sports centres
- 1 libraries
- 1 post offices
- 18 places of worship
- 9 gas stations
- 1 police & fire stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page