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Zip Code 43140 — London, OH

43140 is a ZIP Code associated with London, OH, located within Madison. 43140 ranks #1 out of 7 ZIP codes in Madison County by population (and #160 out of 1,232 in OH). The area supports an estimated population of 24,237 residents across Data Pending housing units, with a population density of 42.6 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (39.884060, -83.429460)

Data MetricLocal Statistic
Postal / Zip Code43140
Primary CityLondon
State / ProvinceOH
CountyMadison
Total Population24,237
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density42.6 people/sq mi
TimezoneAmerica/New_York

How 43140 Compares

MetricZIP 43140Madison CountyOH State Average
Population24,23756,968 (Total)11,810,293 (Total)
Average ZIP IncomeData PendingN/AN/A
Population Density42.6 /sq mi----
County Pop Rank#1 of 7----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 43162West Jefferson7.7 mi6,896N/A
Zip 45369South Vienna10.4 mi4,120N/A
Zip 43151Sedalia10.7 mi233N/A
Zip 45368South Charleston12.2 mi3,889N/A
Zip 43153South Solon12.3 mi1,112N/A

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 →