ZIP Code 43420

43420 is one of Ohio's ZIP codes, delivering to addresses in Fremont, Sandusky County.

City: Fremont
County: Sandusky County
State: Ohio
Prefix: 434xx

Where this code sits

43420 is part of the 434xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Fremont.

Fremont Ohio ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 43420 delivers to without sharing its boundary.

ZIP codes nearest 43420

The ZIP codes whose reference points sit closest to 43420.
ZIP code	Distance	Delivers to
ZIP code 43442	6.7 mi	Lindsey, OH
ZIP code 43410	7.3 mi	Clyde, OH
ZIP code 44861	7.8 mi	Old Fort, OH
ZIP code 44836	8.5 mi	Green Springs, OH
ZIP code 43407	8.8 mi	Burgoon, OH
ZIP code 44815	9.5 mi	Bettsville, OH
ZIP code 43435	11 mi	Helena, OH
ZIP code 43431	12 mi	Gibsonburg, 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 43420, plotted from its record coordinates.

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

Scope ZIP code 43420. 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.