United States Major Regions Postal Code Details

US United States Major Regions Postal Code Details

🏛️ Colorado

80019

Adams

Postal Range: 80019~80640

81101

Alamosa

Postal Range: 81101~81146

80010

Arapahoe

Postal Range: 80010~80247

81121

Archuleta

Postal Range: 81121~81157

81029

Baca

Postal Range: 81029~81090

81038

Bent

Postal Range: 81038~81057

80025

Boulder

Postal Range: 80025~80544

80020

Broomfield

Postal Range: 80020~80038

81201

Chaffee

Postal Range: 81201~81242

80802

Cheyenne

Postal Range: 80802~80862

80436

Clear Creek

Postal Range: 80436~80476

81120

Conejos

Postal Range: 81120~81151

81123

Costilla

Postal Range: 81123~81152

81033

Crowley

Postal Range: 81033~81076

81252

Custer

Postal Range: 81252~81253

81410

Delta

Postal Range: 81410~81428

80201

Denver

Postal Range: 80201~80299

81320

Dolores

Postal Range: 81320~81332

80104

Douglas

Postal Range: 80104~80163

80423

Eagle

Postal Range: 80423~81658

80106

El Paso

Postal Range: 80106~80997

80101

Elbert

Postal Range: 80101~80835

81212

Fremont

Postal Range: 81212~81290

81601

Garfield

Postal Range: 81601~81652

80422

Gilpin

Postal Range: 80422~80474

80442

Grand

Postal Range: 80442~80482

81210

Gunnison

Postal Range: 81210~81434

81235

Hinsdale

Postal Range: 81235

81040

Huerfano

Postal Range: 81040~81089

80430

Jackson

Postal Range: 80430~80480

80001

Jefferson

Postal Range: 80001~80470

81021

Kiowa

Postal Range: 81021~81071

80805

Kit Carson

Postal Range: 80805~80861

81122

La Plata

Postal Range: 81122~81329

80429

Lake

Postal Range: 80429~81251

80511

Larimer

Postal Range: 80511~80553

81020

Las Animas

Postal Range: 81020~81091

80804

Lincoln

Postal Range: 80804~80828

80722

Logan

Postal Range: 80722~80751

81501

Mesa

Postal Range: 81501~81646

81130

Mineral

Postal Range: 81130

81610

Moffat

Postal Range: 81610~81653

81321

Montezuma

Postal Range: 81321~81335

81220

Montrose

Postal Range: 81220~81431

80649

Morgan

Postal Range: 80649~80750

81030

Otero

Postal Range: 81030~81077

81427

Ouray

Postal Range: 81427~81432

80420

Park

Postal Range: 80420~80827

80721

Phillips

Postal Range: 80721~80746

81611

Pitkin

Postal Range: 81611~81656

81041

Prowers

Postal Range: 81041~81092

81001

Pueblo

Postal Range: 81001~81069

81641

Rio Blanco

Postal Range: 81641~81648

81125

Rio Grande

Postal Range: 81125~81154

80428

Routt

Postal Range: 80428~81639

81131

Saguache

Postal Range: 81131~81248

81433

San Juan

Postal Range: 81433

81325

San Miguel

Postal Range: 81325~81435

80737

Sedgwick

Postal Range: 80737~80749

80424

Summit

Postal Range: 80424~80498

80813

Teller

Postal Range: 80813~80866

80720

Washington

Postal Range: 80720~80812

80504

Weld

Postal Range: 80504~80754

80727

Yuma

Postal Range: 80727~80824

📮US United States Regional Postal Code FAQ & Postal Regulations

📮 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.

🔍 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.

⚠️ 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.

🔄 Do ZIP codes ever change?

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

📦 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).