Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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zipcodes.pro — STATE/ID/COUNTY/GEM

Gem County, ID ZIP codes

Gem County, ID has 4 ZIP codes, in 4 towns: 83617, 83670, 83636 and 83657. 1 more crosses into it from a neighbouring county: 83616.

The county seat is Emmett.

ZIP codes
4
Partly in it
1 more
Towns
4
County seat
Emmett
County FIPS
16045
State
Idaho
Population
20,614
Median household income
$64,605
Land area
560 sq mi
Metro area
Boise City

Gem County ZIP codes by town

Emmett (county seat)
83617

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

ZIP codes partly in Gem County

This ZIP code lies mostly in a neighbouring county but covers a twentieth or more of Gem County.

Map of Gem County ZIP codes

83617836368365783670

The ZIP codes of Gem County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Gem County in numbers

About 20,614 people live in Gem County, in 7,643 households, the 19th most populous of Idaho's 44 counties. The median household income is $64,605 a year, 17% below the Idaho median of $77,800 (US: $80,734). The median owner-occupied home is valued at $428,700 (about the same as the Idaho median), and median gross rent is $1,038 a month. The median age is 44.2; 20.7% of adults 25 and over hold a bachelor's degree or higher (31.8% across Idaho); the average commute takes 30 minutes.

Population20,614Gem20,614
Households7,643Gem7,643
Median age44.2Gem44.2Idaho37.3US 38.9
Median household income$64,605Gem$64,605Idaho$77,800US $80,734
Median home value$428,700Gem$428,700Idaho$418,600US $332,700
Median gross rent$1,038Gem$1,038Idaho$1,238US $1,413
Bachelor's degree or higher20.7%Gem20.7%Idaho31.8%US 35.7%
Mean commute30.3 minGem30.3 minIdaho21.6 minUS 26.4 min
Population density37 / sq miGem37 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Gem County

Largest towns in Gem County
TownZIP codesPopulation
Emmett 1 8,275
Sweet 1 752
Ola 1 156
Letha 1 109

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Gem County.

Not sure you are in Gem County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Gem County, with figures

ZIP codes in Gem County
ZIP City Type Population Median income Median home
83617 Emmett , ID Standard 19,058 $65,291 $429,100
83636 Letha , ID Standard 109 $85,761 —
83657 Ola , ID Standard 156 $51,183 $606,000
83670 Sweet , ID Standard 752 $91,685 $506,300

Cite this page

zipcodes.pro. “Gem County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/id/county/gem

Underlying data is public domain or openly licensed — sources, vintages and licences.