United States Major Regions Postal Code Details

US United States Major Regions Postal Code Details

🏛️ California

94501

Alameda

Postal Range: 94501~94720

95646

Alpine

Postal Range: 95646~96120

95601

Amador

Postal Range: 95601~95699

95914

Butte

Postal Range: 95914~95978

95221

Calaveras

Postal Range: 95221~95257

95912

Colusa

Postal Range: 95912~95987

94505

Contra Costa

Postal Range: 94505~94850

95531

Del Norte

Postal Range: 95531~95567

95613

El Dorado

Postal Range: 95613~96158

93210

Fresno

Postal Range: 93210~93888

95913

Glenn

Postal Range: 95913~95988

95501

Humboldt

Postal Range: 95501~95589

92222

Imperial

Postal Range: 92222~92283

92328

Inyo

Postal Range: 92328~93549

93203

Kern

Postal Range: 93203~93596

93202

Kings

Postal Range: 93202~93266

95422

Lake

Postal Range: 95422~95493

96009

Lassen

Postal Range: 96009~96137

90001

Los Angeles

Postal Range: 90001~93599

93601

Madera

Postal Range: 93601~93669

94901

Marin

Postal Range: 94901~94998

93623

Mariposa

Postal Range: 93623~95389

95410

Mendocino

Postal Range: 95410~95587

93620

Merced

Postal Range: 93620~95388

96006

Modoc

Postal Range: 96006~96116

93512

Mono

Postal Range: 93512~96133

93426

Monterey

Postal Range: 93426~95039

94503

Napa

Postal Range: 94503~94599

95712

Nevada

Postal Range: 95712~96162

90620

Orange

Postal Range: 90620~92899

95602

Placer

Postal Range: 95602~96148

95915

Plumas

Postal Range: 95915~96135

91752

Riverside

Postal Range: 91752~92883

94203

Sacramento

Postal Range: 94203~95899

95023

San Benito

Postal Range: 95023~95075

91701

San Bernardino

Postal Range: 91701~93592

91901

San Diego

Postal Range: 91901~92199

94102

San Francisco

Postal Range: 94102~94188

95201

San Joaquin

Postal Range: 95201~95686

93401

San Luis Obispo

Postal Range: 93401~93483

94002

San Mateo

Postal Range: 94002~94497

93013

Santa Barbara

Postal Range: 93013~93464

94022

Santa Clara

Postal Range: 94022~95196

95001

Santa Cruz

Postal Range: 95001~95077

96001

Shasta

Postal Range: 96001~96099

95910

Sierra

Postal Range: 95910~96126

95568

Siskiyou

Postal Range: 95568~96134

94510

Solano

Postal Range: 94510~95696

94922

Sonoma

Postal Range: 94922~95497

95307

Stanislaus

Postal Range: 95307~95397

95659

Sutter

Postal Range: 95659~95993

96021

Tehama

Postal Range: 96021~96092

95527

Trinity

Postal Range: 95527~96093

93201

Tulare

Postal Range: 93201~93673

95305

Tuolumne

Postal Range: 95305~95383

91319

Ventura

Postal Range: 91319~93099

95605

Yolo

Postal Range: 95605~95937

95692

Yuba

Postal Range: 95692~95981

📮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).