Declo, ID ZIP Code

ZIP code, county, time zone and coordinates of Declo, Idaho

The ZIP code of Declo, ID is 83311. It is in Cassia County.

Mailing address format for Declo

John Smith
123 Main St
DECLO ID 83311
USA

USPS prefers capital letters without punctuation. Check the exact ZIP+4 for a street address on the USPS website.

ZIP code	Population	Area
83311	—	92.5 sq mi	Main

ZIP Code Tabulation Areas (ZCTA), U.S. Census Bureau. A ZCTA can cover parts of more than one town.

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What is the ZIP code for Declo, ID?

The main ZIP code for Declo, ID is 83311.

How many ZIP codes does Declo have?

Declo has 1 ZIP code.

What county is Declo, ID in?

Declo is in Cassia County, Idaho.

What time zone is Declo in?

Declo is in the America/Boise time zone (MST, UTC-07:00 right now).

What are the coordinates of Declo?

Latitude 42.51960, longitude -113.62873.

Last updated: November 14, 2026