ZIP Code 45866

45866 is one of Ohio's ZIP codes, delivering to addresses in Montezuma, Mercer County.

City: Montezuma
County: Mercer County
State: Ohio
Prefix: 458xx

Where this code sits

45866 is part of the 458xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Montezuma.

Montezuma Ohio ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 45866 delivers to without sharing its boundary.

ZIP codes nearest 45866

The ZIP codes whose reference points sit closest to 45866.
ZIP code	Distance	Delivers to
ZIP code 45826	4.6 mi	Chickasaw, OH
ZIP code 45828	5.4 mi	Coldwater, OH
ZIP code 45860	6.1 mi	Maria Stein, OH
ZIP code 45822	6.3 mi	Celina, OH
ZIP code 45883	7.1 mi	Saint Henry, OH
ZIP code 45885	9.0 mi	Saint Marys, OH
ZIP code 45869	9.5 mi	New Bremen, OH
ZIP code 45310	11 mi	Burkettsville, OH

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 45866, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 45866. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.