ZIP Code 43440

43440 is one of Ohio's ZIP codes, delivering to addresses in Lakeside Marblehead, Ottawa County.

City: Lakeside Marblehead
County: Ottawa County
State: Ohio
Prefix: 434xx

Where this code sits

43440 is part of the 434xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Lakeside Marblehead.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 43440 delivers to without sharing its boundary.

ZIP codes nearest 43440

The ZIP codes whose reference points sit closest to 43440.
ZIP code	Distance	Delivers to
ZIP code 43433	5.1 mi	Gypsum, OH
ZIP code 44871	6.3 mi	Sandusky, OH
ZIP code 43438	6.4 mi	Kelleys Island, OH
ZIP code 44870	7.2 mi	Sandusky, OH
ZIP code 43452	8.4 mi	Port Clinton, OH
ZIP code 43456	9.1 mi	Put In Bay, OH
ZIP code 44824	9.6 mi	Castalia, OH
ZIP code 43446	11 mi	Middle Bass, 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 43440, plotted from its record coordinates.

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

Scope ZIP code 43440. 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.