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Zip Code 45042 — Middletown, OH

ZIP Code 45042 is associated with Middletown, OH, in Butler County. The listed population estimate is 27,652; estimated density is 217.1 people per square mile. Among records with population estimates, it ranks #6 of 14 in Butler County and #126 of 1,215 in OH.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (39.548670, -84.437550)

Data MetricLocal Statistic
Postal / Zip Code45042
Primary CityMiddletown
State / ProvinceOH
CountyButler
Total Population27,652
Population Density217.1 people/sq mi
TimezoneAmerica/New_York

How 45042 Compares

MetricZIP 45042Butler County recordsOH records
Population estimate27,652389,474 (sum)11,810,293 (sum)
Population Density217.1 /sq mi----
County population rank#6 of 14----
State population rank#126 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 45067Trenton4.6 mi15,471
ZIP 45327Germantown6.2 mi9,315
ZIP 45070West Elkton7.0 mi142
ZIP 45005Franklin7.3 mi32,251
ZIP 45055Overpeck7.4 mi198

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 →