US United States Major Regions Postal Code Details

๐Ÿ›๏ธ Union ยท South Dakota
57001
Alcester
Alcester union south dakota 57001 United States
57004
Alsen
Alsen union south dakota 57004 United States
57004
Beresford
Beresford union south dakota 57004 United States
57001
Big Springs
Big Springs union south dakota 57001 United States
57049
Dakota Dunes
Dakota Dunes union south dakota 57049 United States
57025
Elk Point
Elk Point union south dakota 57025 United States
57004
Emmet
Emmet union south dakota 57004 United States
57038
Jefferson
Jefferson union south dakota 57038 United States
57025
Junction City
Junction City union south dakota 57025 United States
57049
McCook Lake
McCook Lake union south dakota 57049 United States
57001
Nora
Nora union south dakota 57001 United States
57049
North Sioux City
North Sioux City union south dakota 57049 United States
57025
Richland
Richland union south dakota 57025 United States
57025
Spink
Spink union south dakota 57025 United States

๐Ÿ“ฎUS United States Regional Postal Code FAQ & Postal Regulations

๐Ÿ“ฎ What is the format of a US ZIP code?

Standard format is 5 digits (e.g., 10001). Extended format is ZIP+4 (9 digits like 10001-1234) with a hyphen.

๐Ÿ” How to find the ZIP code for an address?

Use the USPS ZIP Code Lookup tool by entering the full address on the official USPS website.

โš ๏ธ What happens if I use a wrong ZIP code?

Mail may be delayed, returned, or lost. For important documents, use USPS tracking and verify the ZIP code.

๐Ÿ”„ Do ZIP codes ever change?

Yes, USPS may update ZIP codes due to regional adjustments. Always confirm your ZIP code after an address change.

๐Ÿ“ฆ Is a ZIP code required for international mail to the US?

Absolutely. Always include the US ZIP code at the end of the address (e.g., New York, NY 10001 USA).

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๐Ÿ“ฎ Popular United States Postal Codes