ZIP Codes of Guam County, GU

Data Last Updated: November 1, 2026
ZIP Codes:12 ZIP Codes (4 Standard, 8 PO Box, 0 Unique) [See All]
Area Code:671
Timezone:GMT -14:00
Local Time:11:13:03 PM
FIPS:66010
Land Area:210 sq mi
Water Area:6 sq mi
Coordinates:13.4422, 144.7717
Quick Link:
https://www.zip-codes.com/county/gu-guam.asp
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Standout ZIPs in this County


Most Populous
— no population data
Highest Income
— no income data
Largest Land Area
Santa Rita · 103.8 sq mi
Spans the most ground
Fastest Growth
— growth not calculable
Most Educated
— no education data

Things worth knowing about Guam County


0 residents live across 12 ZIPs covering 210 sq mi, served by 10 distinct USPS-recognized cities.

Within GU, this is the #1 most populous of 1 counties .

4 Standard delivery, 8 PO Box only, 0 single-entity Unique ZIPs serve this county.

All ZIP Codes in Guam County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
96916MerizoPO Box——0.0—
96917InarajanPO Box——0.0—
96915Santa RitaStandard——103.8—
96928AgatPO Box——0.0—
96923MangilaoPO Box——0.0—
96910HagatnaStandard——15.6—
96932HagatnaPO Box——0.0—
96921BarrigadaPO Box——0.0—
96913BarrigadaStandard——24.7—
96931TamuningPO Box——0.0—
96912DededoPO Box——0.0—
96929YigoStandard——66.2—

Adjacent & Nearby Counties