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Zip Code 45390 — Union City, OH

ZIP Code 45390 is associated with Union City, OH, in Darke County. The listed population estimate is 3,432; estimated density is 24.7 people per square mile. Among records with population estimates, it ranks #5 of 16 in Darke County and #635 of 1,215 in OH.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (40.218940, -84.767780)

Data MetricLocal Statistic
Postal / Zip Code45390
Primary CityUnion City
State / ProvinceOH
CountyDarke
Total Population3,432
Population Density24.7 people/sq mi
TimezoneAmerica/New_York

How 45390 Compares

MetricZIP 45390Darke County recordsOH records
Population estimate3,43251,969 (sum)11,810,293 (sum)
Population Density24.7 /sq mi----
County population rank#5 of 16----
State population rank#635 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 45303Ansonia5.9 mi2,188
ZIP 45362Rossburg8.5 mi1,071
ZIP 45348New Weston9.6 mi848
ZIP 45331Greenville10.6 mi22,356
ZIP 45310Burkettsville11.4 mi227

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 →