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Zip Code 45866 — Montezuma, OH

45866 is a ZIP Code associated with Montezuma, OH, located within Mercer. The postal region supports an estimated population of 117 residents across Data Pending housing units, with a population density of 441.9 people per square mile.

WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (40.489050, -84.549690)

Data Metric	Local Statistic
Postal / Zip Code	45866
Primary City	Montezuma
State / Province	OH
County	Mercer
Total Population	117
Median Household Income	Data Pending
Total Housing Units	Data Pending
Population Density	441.9 people/sq mi
Timezone	America/New_York

How 45866 Compares

Metric	ZIP 45866	Mercer County	OH State Average
Population	117	42,549	11,810,293
Median Income	Data Pending	N/A	N/A
Population Density	441.9 /sq mi	--	--

Nearby ZIP Codes

ZIP Code	City	Distance	Population	Median Income
Zip 45826	Chickasaw	4.7 mi	394	N/A
Zip 45822	Celina	5.0 mi	19,957	N/A
Zip 45828	Coldwater	6.7 mi	6,404	N/A
Zip 45860	Maria Stein	6.8 mi	2,326	N/A
Zip 45883	Saint Henry	7.1 mi	4,144	N/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 →