Find Any ZIP Code in the United States
Search by city, state, or address to get the correct ZIP code, view location details, maps, demographics, and more.
Popular Cities
Explore ZIP codes for the largest and most-searched cities across the United States.
Browse ZIP Codes by State
Select a state to browse every ZIP code, city, and area code in that state.
California 
Texas 
Florida 
New York 
Pennsylvania 
Illinois 
Ohio 
Georgia 
North Carolina 
Michigan ZIP Code Guides & Resources
Learn how ZIP codes work, how to find one, and how they differ from area codes.
What is a ZIP Code?
Learn what ZIP codes mean, how they are structured, and why they matter for mail delivery.
Read More →
How to Find a ZIP Code
Find any ZIP code by city, state, or address in seconds with our free lookup tools.
Read More →
ZIP Code vs Area Code
Understand the difference between postal ZIP codes and telephone area codes.
Read More →
ZIP Code FAQs
Answers to the most common questions about ZIP codes, boundaries, and changes.
Read More →ZIP Code Lookup — Find Any ZIP Code in the United States
The fastest way to look up ZIP codes by address, city, or state — free, with no sign-up.
Need a ZIP code right now? ZipsCode.us is a free ZIP code finder covering more than 42,000 ZIP codes across all 50 states and the District of Columbia. Enter an address, a city name, or a ZIP code in the search box above and get the matching location instantly — the same location data that online stores, delivery drivers, and businesses rely on every day to get mail and packages to the right door.
How to Find a ZIP Code in Seconds
Type a street address, city, and state into the ZIP code by address tool to get the exact 5-digit ZIP code — and the ZIP+4 add-on — for that address.
Use ZIP code by city and state to see every ZIP code a city uses — from a single code in a small town to more than 140 in New York City.
Prefer to explore? Browse ZIP codes by state — open any state page to see its cities and ZIP codes in one clean list, from California and Texas to Vermont and Wyoming.
Every ZIP code on this site comes from published U.S. Postal Service and national postal data, organized by state, county, and city and updated for 2026. The Postal Service adjusts ZIP code boundaries every year — our directory reflects the current assignment, not last year’s.
What Is a ZIP Code?
What the five digits mean, where they came from, and how to read them.
A ZIP code is a five-digit number that the United States Postal Service (USPS) assigns to a geographic mail delivery area. “ZIP” stands for Zone Improvement Plan. The system was introduced in 1963 so the Postal Service could sort and deliver a fast-growing volume of mail more quickly and accurately. Today, almost everything from online checkouts and bank forms to GPS and delivery apps uses ZIP codes to identify places.
How to Read a ZIP Code
Each digit narrows the location down. The first digit names one of ten large regions of the country. The next two digits point to the sectional center facility — the regional sorting hub for a state or metro area. The last two digits identify the specific post office or delivery zone. Take 90210: the 9 puts it on the West Coast, the 02 narrows it to the Los Angeles area, and the 10 finishes at Beverly Hills.
| First Digit | Region | States & Territories |
|---|---|---|
| 0 | New England & Northeast | Connecticut, Maine, Massachusetts, New Hampshire, New Jersey, Rhode Island, Vermont, Puerto Rico |
| 1 | Mid-Atlantic (North) | Delaware, New York, Pennsylvania |
| 2 | Mid-Atlantic (South) | District of Columbia, Maryland, North Carolina, South Carolina, Virginia, West Virginia |
| 3 | Southeast | Alabama, Florida, Georgia, Mississippi, Tennessee |
| 4 | Great Lakes (East) | Indiana, Kentucky, Michigan, Ohio |
| 5 | Upper Midwest & Northern Plains | Iowa, Minnesota, Montana, North Dakota, South Dakota, Wisconsin |
| 6 | Central | Illinois, Kansas, Missouri, Nebraska |
| 7 | South Central | Arkansas, Louisiana, Oklahoma, Texas |
| 8 | Mountain West | Arizona, Colorado, Idaho, Nevada, New Mexico, Utah, Wyoming |
| 9 | West Coast & Pacific | Alaska, California, Hawaii, Oregon, Washington |
One thing surprises many people: ZIP codes follow mail routes, not city limits. A single ZIP code can cross city, county, and even state lines — and one city can contain dozens of ZIP codes. That is exactly why looking a code up is smarter than guessing it.
ZIP Code vs. ZIP+4 — What Is the Difference?
When five digits are enough, and when the extra four matter.
The standard ZIP code has five digits. A ZIP+4 code adds a hyphen and four more digits — for example, 90210-3101 — to narrow the delivery area down to a few blocks, one side of a street, a single large building, or one company that receives a high volume of mail.
The +4 add-on is optional for everyday letters, but it speeds up sorting, reduces misdelivered mail, and many government and banking forms ask for the full nine digits. Use our free ZIP+4 lookup to find the extended code for an address, or run the address through address verification to make sure every part of it — street, city, state, and ZIP — is correct before you send.
ZIP Code FAQs
Quick answers to the questions people ask most about ZIP codes.
How do I find the ZIP code for my address?
Enter the street address, city, and state into our free ZIP code by address tool and it will show the ZIP code for that exact address. You can also search by city name on this page to see every ZIP code used in that city.
What is a ZIP+4 code?
A ZIP+4 code adds four extra digits to the basic 5-digit ZIP code to pinpoint a smaller delivery area — sometimes a single building, business, or street segment. It is optional for most mail, but it helps the Postal Service sort and deliver faster and more accurately. Try our ZIP+4 lookup to find one.
How many ZIP codes are there in the United States?
There are more than 42,000 ZIP codes in active use across the United States, covering all 50 states plus the District of Columbia and U.S. territories. ZipsCode.us lists them all, organized by state and by city, so you can browse the complete directory.
Can one city have more than one ZIP code?
Yes — most larger cities have several. New York City alone uses more than 140 ZIP codes, and Houston, Chicago, and Los Angeles each have dozens, while a small town may have just one. Open any city page on ZipsCode.us to see the full list of ZIP codes for that city.
What is the difference between a ZIP code and an area code?
A ZIP code identifies a mail delivery area and is assigned by the U.S. Postal Service. An area code is part of a telephone number and identifies a calling region. They follow different maps: one area code can cover hundreds of ZIP codes, and a single large city can span several area codes.
Is ZipsCode.us free to use?
Yes, completely free. Search, browse, and use all of our ZIP code tools as often as you like — no account, no downloads, and no hidden charges.