ZIP codes are vital for identifying geographic areas in the United States. Each ZIP code corresponds to a specific region, often a town, city, or rural community, and helps streamline mail delivery and administrative planning. Whether you’re a business owner, researcher, or someone moving to a new area, understanding ZIP code boundaries by county is essential.
This page allows you to easily browse ZIP codes by county and state. Just click on a state below to reveal all counties in that state along with links to their complete ZIP code listings.
How to find your area Zip Code by County?
To find your area Zip code, Follow the below steps:
- Click on your state from the below list.
- Choose the county you’re in right now from the table.
- Click on the “View Zip codes” link beside your selected county to find the zip codes inside it.
| County | Approx. Zipcodes Count | View Zipcodes |
|---|---|---|
| Yuma County | 11 | Yuma County Zipcodes |
| Pinal County | 34 | Pinal County Zipcodes |
| Navajo County | 28 | Navajo County Zipcodes |
| Greenlee County | 4 | Greenlee County Zipcodes |
| Maricopa County | 193 | Maricopa County Zipcodes |
| Pima County | 71 | Pima County Zipcodes |
| Cochise County | 25 | Cochise County Zipcodes |
| Coconino County | 28 | Coconino County Zipcodes |
| Gila County | 12 | Gila County Zipcodes |
| Graham County | 11 | Graham County Zipcodes |
| Mohave County | 31 | Mohave County Zipcodes |
| Yavapai County | 36 | Yavapai County Zipcodes |
| La Paz County | 8 | La Paz County Zipcodes |
| Santa Cruz County | 10 | Santa Cruz County Zipcodes |
| Apache County | 30 | Apache County Zipcodes |
| County | Approx. Zipcodes Count | View Zipcodes |
|---|---|---|
| Middlesex County | 27 | Middlesex County Zipcodes |
| New London County | 39 | New London County Zipcodes |
| New Haven County | 81 | New Haven County Zipcodes |
| Tolland County | 27 | Tolland County Zipcodes |
| Hartford County | 107 | Hartford County Zipcodes |
| Windham County | 39 | Windham County Zipcodes |
| Fairfield County | 73 | Fairfield County Zipcodes |
| Litchfield County | 48 | Litchfield County Zipcodes |
| County | Approx. Zipcodes Count | View Zipcodes |
|---|---|---|
| New Castle County | 47 | New Castle County Zipcodes |
| Sussex County | 24 | Sussex County Zipcodes |
| Kent County | 21 | Kent County Zipcodes |
| County | Approx. Zipcodes Count | View Zipcodes |
|---|---|---|
| Honolulu County | 61 | Honolulu County Zipcodes |
| Kalawao County | 1 | Kalawao County Zipcodes |
| Kauai County | 17 | Kauai County Zipcodes |
| Maui County | 18 | Maui County Zipcodes |
| Hawaii County | 32 | Hawaii County Zipcodes |
| County | Approx. Zipcodes Count | View Zipcodes |
|---|---|---|
| Androscoggin County | 29 | Androscoggin County Zipcodes |
| Sagadahoc County | 12 | Sagadahoc County Zipcodes |
| Washington County | 32 | Washington County Zipcodes |
| Waldo County | 20 | Waldo County Zipcodes |
| York County | 45 | York County Zipcodes |
| Penobscot County | 50 | Penobscot County Zipcodes |
| Kennebec County | 41 | Kennebec County Zipcodes |
| Oxford County | 36 | Oxford County Zipcodes |
| Piscataquis County | 15 | Piscataquis County Zipcodes |
| Lincoln County | 30 | Lincoln County Zipcodes |
| Cumberland County | 57 | Cumberland County Zipcodes |
| Hancock County | 45 | Hancock County Zipcodes |
| Knox County | 22 | Knox County Zipcodes |
| Franklin County | 22 | Franklin County Zipcodes |
| Aroostook County | 48 | Aroostook County Zipcodes |
| Somerset County | 30 | Somerset County Zipcodes |
| County | Approx. Zipcodes Count | View Zipcodes |
|---|---|---|
| Hampshire County | 33 | Hampshire County Zipcodes |
| Suffolk County | 51 | Suffolk County Zipcodes |
| Barnstable County | 56 | Barnstable County Zipcodes |
| Worcester County | 105 | Worcester County Zipcodes |
| Nantucket County | 3 | Nantucket County Zipcodes |
| Dukes County | 7 | Dukes County Zipcodes |
| Hampden County | 56 | Hampden County Zipcodes |
| Berkshire County | 42 | Berkshire County Zipcodes |
| Bristol County | 47 | Bristol County Zipcodes |
| Middlesex County | 108 | Middlesex County Zipcodes |
| Essex County | 59 | Essex County Zipcodes |
| Norfolk County | 58 | Norfolk County Zipcodes |
| Plymouth County | 65 | Plymouth County Zipcodes |
| Franklin County | 38 | Franklin County Zipcodes |
| County | Approx. Zipcodes Count | View Zipcodes |
|---|---|---|
| Churchill County | 4 | Churchill County Zipcodes |
| Humboldt County | 6 | Humboldt County Zipcodes |
| Clark County | 114 | Clark County Zipcodes |
| Mineral County | 4 | Mineral County Zipcodes |
| Nye County | 11 | Nye County Zipcodes |
| Douglas County | 10 | Douglas County Zipcodes |
| White Pine County | 6 | White Pine County Zipcodes |
| Carson City | 11 | Carson City Zipcodes |
| Eureka County | 3 | Eureka County Zipcodes |
| Elko County | 16 | Elko County Zipcodes |
| Lyon County | 9 | Lyon County Zipcodes |
| Lander County | 2 | Lander County Zipcodes |
| Washoe County | 38 | Washoe County Zipcodes |
| Storey County | 5 | Storey County Zipcodes |
| Lincoln County | 5 | Lincoln County Zipcodes |
| Pershing County | 4 | Pershing County Zipcodes |
| Esmeralda County | 3 | Esmeralda County Zipcodes |
| County | Approx. Zipcodes Count | View Zipcodes |
|---|---|---|
| Grafton County | 41 | Grafton County Zipcodes |
| Sullivan County | 21 | Sullivan County Zipcodes |
| Cheshire County | 29 | Cheshire County Zipcodes |
| Coos County | 17 | Coos County Zipcodes |
| Merrimack County | 39 | Merrimack County Zipcodes |
| Carroll County | 32 | Carroll County Zipcodes |
| Rockingham County | 49 | Rockingham County Zipcodes |
| Hillsborough County | 42 | Hillsborough County Zipcodes |
| Strafford County | 24 | Strafford County Zipcodes |
| Belknap County | 20 | Belknap County Zipcodes |
| County | Approx. Zipcodes Count | View Zipcodes |
|---|---|---|
| Sussex County | 31 | Sussex County Zipcodes |
| Camden County | 41 | Camden County Zipcodes |
| Union County | 40 | Union County Zipcodes |
| Cape May County | 22 | Cape May County Zipcodes |
| Burlington County | 42 | Burlington County Zipcodes |
| Middlesex County | 54 | Middlesex County Zipcodes |
| Hudson County | 22 | Hudson County Zipcodes |
| Monmouth County | 62 | Monmouth County Zipcodes |
| Somerset County | 41 | Somerset County Zipcodes |
| Ocean County | 34 | Ocean County Zipcodes |
| Gloucester County | 32 | Gloucester County Zipcodes |
| Cumberland County | 26 | Cumberland County Zipcodes |
| Morris County | 65 | Morris County Zipcodes |
| Essex County | 40 | Essex County Zipcodes |
| Bergen County | 75 | Bergen County Zipcodes |
| Warren County | 23 | Warren County Zipcodes |
| Passaic County | 44 | Passaic County Zipcodes |
| Salem County | 15 | Salem County Zipcodes |
| Hunterdon County | 35 | Hunterdon County Zipcodes |
| Atlantic County | 37 | Atlantic County Zipcodes |
| Mercer County | 36 | Mercer County Zipcodes |
| County | Approx. Zipcodes Count | View Zipcodes |
|---|---|---|
| Washington County | 23 | Washington County Zipcodes |
| Providence County | 47 | Providence County Zipcodes |
| Bristol County | 4 | Bristol County Zipcodes |
| Newport County | 9 | Newport County Zipcodes |
| Kent County | 14 | Kent County Zipcodes |
| County | Approx. Zipcodes Count | View Zipcodes |
|---|---|---|
| Franklin County | 22 | Franklin County Zipcodes |
| Orange County | 37 | Orange County Zipcodes |
| Essex County | 14 | Essex County Zipcodes |
| Rutland County | 36 | Rutland County Zipcodes |
| Lamoille County | 17 | Lamoille County Zipcodes |
| Caledonia County | 31 | Caledonia County Zipcodes |
| Bennington County | 24 | Bennington County Zipcodes |
| Grand Isle County | 5 | Grand Isle County Zipcodes |
| Chittenden County | 31 | Chittenden County Zipcodes |
| Windsor County | 44 | Windsor County Zipcodes |
| Washington County | 35 | Washington County Zipcodes |
| Addison County | 23 | Addison County Zipcodes |
| Windham County | 31 | Windham County Zipcodes |
| Orleans County | 30 | Orleans County Zipcodes |
| County | Approx. Zipcodes Count | View Zipcodes |
|---|---|---|
| Lincoln County | 15 | Lincoln County Zipcodes |
| Fremont County | 15 | Fremont County Zipcodes |
| Uinta County | 7 | Uinta County Zipcodes |
| Big Horn County | 16 | Big Horn County Zipcodes |
| Hot Springs County | 3 | Hot Springs County Zipcodes |
| Washakie County | 2 | Washakie County Zipcodes |
| Converse County | 5 | Converse County Zipcodes |
| Sweetwater County | 11 | Sweetwater County Zipcodes |
| Crook County | 8 | Crook County Zipcodes |
| Carbon County | 14 | Carbon County Zipcodes |
| Campbell County | 9 | Campbell County Zipcodes |
| Natrona County | 14 | Natrona County Zipcodes |
| Laramie County | 16 | Laramie County Zipcodes |
| Platte County | 5 | Platte County Zipcodes |
| Weston County | 5 | Weston County Zipcodes |
| Albany County | 14 | Albany County Zipcodes |
| Park County | 8 | Park County Zipcodes |
| Johnson County | 7 | Johnson County Zipcodes |
| Sheridan County | 12 | Sheridan County Zipcodes |
| Niobrara County | 5 | Niobrara County Zipcodes |
| Teton County | 9 | Teton County Zipcodes |
| Sublette County | 6 | Sublette County Zipcodes |
| Goshen County | 13 | Goshen County Zipcodes |
Frequently Asked Questions
1. How many ZIP codes are there in the United States?
There are over 42,000 ZIP codes across the U.S., covering urban, suburban, and rural areas.
2. Do ZIP codes match county boundaries?
Not always. ZIP codes are based on postal delivery routes and may cross county or state lines.
3. How do I find the ZIP codes for my county?
Simply click your state in the accordion above, then select your county to see the ZIP codes listed. You can also use the County by Zip code tool to find your county details based on your zip code.
4. Why are ZIP codes important?
They are used in everything from shipping and logistics to school zoning and political districting.
Source: USPS Zip Code Data , Census.gov