How do I find a ZIP code by city or state?

You can find ZIP codes by city or state using our search tool. Just enter the city or state name, and you'll see all related ZIP codes instantly.

What is a ZIP+4 code?

A ZIP+4 code adds four digits to the basic five-digit ZIP code. It helps the USPS deliver mail more precisely to specific addresses or buildings.

Are ZIP codes the same as postal codes?

ZIP codes are the U.S. version of postal codes, used by the USPS to identify delivery areas. Other countries use postal codes with different formats.

US Postal Address Lookup & USPS ZIP Code Search

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How to Find Any USPS ZIP Code in 10 Seconds

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USPS ZIP Code Lookup – Free Postal Address Search Tool

Instantly find any USPS ZIP code, verify postal addresses, get ZIP+4, view interactive maps & download lists – 100% free with 2025 updated data.

Quickly find any US ZIP code or postal address using our free USPS lookup tool. Verify addresses, check delivery boundaries, locate post offices, or explore ZIP code maps – everything you need in one place. Trusted by e-commerce stores, logistics teams, real estate agents, and millions of everyday users across the USA.

Free USPS ZIP Code Lookup & Postal Address Verification

Need a reliable USPS ZIP code lookup or US postal address lookup? Just type any address, city, or even coordinates – get accurate results in seconds including:

Full 5-digit ZIP code + ZIP+4 extension
Delivery boundaries & interactive maps
Nearest post office locations
Radius search & downloadable lists

State-wise USA ZIP Codes – Accurate ZIP Code Finder

ZIP Codes are unique 5-digit codes assigned by the United States Postal Service (USPS) to speed up mail delivery. There are over 41,000 active ZIP codes covering every state, city, and territory in the USA. Use our ZIP code lookup by state or city to find exact codes instantly – perfect for shipping, marketing, moving, or business use.

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Find Any USPS Address or ZIP Code

Need to find a ZIP code or verify a complete address quickly? Our free US Postal Address Lookup and USPS address verification tool deliver accurate results for any location. Whether you are checking an address for deliveries, planning a business route, using a service kiosk, or confirming your own ZIP code, our database returns the correct details within seconds.

We combine USPS data, U.S. Census information, and live mapping tools to bring you the most reliable ZIP code search experience. This platform helps you explore ZIP codes, demographic snapshots, boundaries, and routing data — all in one place. Our lookup is trusted by logistics teams, researchers, and everyday users across the United States.

Fast & Reliable ZIP Code Finder

Use our usps look up address feature to search by full street address, city, or county and instantly get the correct ZIP code. For more precision, retrieve the ZIP+4 extension to ensure accurate deliveries. Interactive maps let you visualize coverage, run a zip lookup usps radius search, and find nearby codes in seconds. You can also locate post office locations and collection boxes close to you.

Why USPS Address Verification Matters

Incorrect addresses cause late deliveries, higher shipping costs, and unhappy customers. Verified data ensures smooth mail service and clean records for businesses. Our address verification tool helps e-commerce checkouts, CRMs, and ERPs stay error-free — saving time and money.

Benefits of Using Our USPS Lookup Tool

Verify street addresses, buildings, PO boxes, and rural routes before shipping.
Plan optimized delivery routes with ZIP+4 codes and boundary maps.
Locate nearby post office locations and USPS collection boxes quickly.
Export printable ZIP code lists by state, city, or county for offline use.

Understanding the U.S. ZIP Code System

A five-digit ZIP code identifies a delivery area such as a city or neighborhood. The ZIP+4 adds four digits that narrow the location to a single block or building for faster, more accurate delivery. Our usps postal code lookup helps you retrieve each type quickly and accurately, including PO box, unique business, and military codes.

Who Uses ZIP Code Data

Businesses and individuals use our lookup daily. E-commerce sites verify customer addresses at checkout to avoid returns. Logistics providers plan efficient routes. Real estate agents research market activity. Marketers target campaigns by region. Researchers and students analyze population data with zip code by address data. Whether you need a quick usps zip code search or an in-depth lookup for planning, we provide the right tools.

Examples of When to Use USPS Lookup

Moving to a New Place: Confirm your new ZIP code before updating bank and utility addresses.
E-commerce Business: Verify customer addresses to avoid failed deliveries and reshipments.
Field Service Teams: Plan service routes with radius search to cover nearby areas efficiently.
Students & Researchers: Study population trends and demographics for school projects or surveys.

Final Thoughts

Reliable address data saves time, money, and frustration. Our US Postal Address Lookup helps you confirm addresses, find ZIP codes, plan routes, and keep your mailing lists clean. Whether you are a homeowner, a business owner, or a logistics manager, our tool gives you the confidence that every delivery will reach its destination on time.

US Postal Address Lookup & ZIP Code FAQs

A ZIP code is a postal code system used by the United States Postal Service (USPS) to efficiently deliver mail and identify geographic regions. You can also use our USPS address verification tool or ZIP lookup to confirm addresses and locate collection boxes.

A standard ZIP code has 5 digits. ZIP+4 codes include 4 extra digits to pinpoint a more specific location, which improves mail delivery accuracy. Our ZIP code lookup tool can help you retrieve both formats quickly.

ZIP codes are assigned and maintained by the United States Postal Service (USPS). Using our USPS address lookup tool ensures you get verified and up-to-date ZIP code information for any location.

Typically, each ZIP code belongs to a single state. However, in border regions, a ZIP code may sometimes cover addresses in two nearby states. Our ZIP lookup tool helps clarify the correct postal code for such cases.

You can find your ZIP code on the USPS website, using online ZIP code lookup tools, or by checking mail and utility bills. Our address verification tool makes this process fast and easy.

A ZIP+4 code adds four extra digits to the standard ZIP code to specify a smaller area like a block, apartment, or PO box. Using our ZIP lookup tool ensures you retrieve accurate ZIP+4 codes quickly.

ZIP codes help organize mail delivery, support emergency services, and provide valuable data for marketing, research, and demographic analysis. Verified addresses using our tool improve all these processes.

No, ZIP codes are designed for efficient mail delivery and may not align perfectly with city or county boundaries. Our address lookup tool helps you find the correct ZIP for any location.

ZIP codes were introduced on July 1, 1963 by the USPS to improve mail delivery efficiency. Our ZIP code search tool provides modern and updated postal information based on these official codes.

Yes, businesses may use a nearby ZIP code for PO boxes or mailing purposes even if their physical location is in a different ZIP code area. Our USPS address verification tool helps confirm accurate codes for both cases.

Disclaimer: The content on this website is provided for general informational purposes only. While we make every effort to ensure that the information is accurate and up-to-date, it should not be relied upon as a substitute for professional advice. We do not accept any responsibility for any errors, omissions, or consequences that may arise from using the information presented here.