Zip Code Radius Map

How to Find Zip Codes Within a Radius

1

Enter Your Center Zip Code

Type any US zip code (e.g., 90210, 10001, 60601) in the search field. The map will center on that location and show the zip code boundary.

2

Set Your Radius Distance

Choose from preset distances (5, 10, 25, 50, 100 miles) or enter a custom radius. The tool draws a circle from the center of your zip code extending outward.

3

View Matching Zip Codes

All zip codes that fall within (or overlap) your radius are highlighted on the map and listed in the results panel. The count updates in real-time as you adjust the radius.

4

Sort and Filter Results

Sort results by distance from center, zip code number, city name, or state. Click on any zip code to highlight it on the map and see its details.

5

Export Your List

Click “Export CSV” to download the complete list. The file includes zip code, city, state, and distance from center — ready for mail merges, CRM imports, or ad targeting.

US Zip Code Statistics

States with Most Zip Codes

Texas1,675
California1,516
New York1,596
Pennsylvania1,458
Illinois1,243
Ohio1,007

Average Zip Codes per Radius

Based on typical urban/suburban density:

5-mile radius15-40 zip codes
10-mile radius40-100 zip codes
25-mile radius100-300 zip codes
50-mile radius200-600 zip codes
100-mile radius400-1,200 zip codes

* Density varies by region. Urban areas have more zip codes per square mile than rural areas.

Zip Code Density by Major Metro Area

Metro AreaCenter Zip10-mi Radius25-mi Radius50-mi Radius
New York City10001196512860
Los Angeles9001296277425
Chicago6060150187345
Houston7700252141224
Phoenix8500435112147
Philadelphia19102104251525
San Antonio782053882130
Dallas7520145143260

Counts computed from this site's ZIP database (Computed from SimpleMaps US ZIPs Free (33783 ZIPs)). Distances are haversine from each metro's downtown ZIP centroid. Database updated 2026-06-11.

Understanding Zip Code Boundaries

What is a ZCTA?

The US Census Bureau creates Zip Code Tabulation Areas (ZCTAs) to approximate zip code boundaries with polygons. Unlike USPS zip codes (which are delivery routes, not geographic areas), ZCTAs let researchers tie census data to zip codes. This tool uses the centroid (center point latitude/longitude) of each ZCTA — provided by the SimpleMaps US ZIPs Free dataset — to test whether a zip code falls within your radius.

How a ZIP gets included

Each ZIP in the database has a single center point. The radius test compares that point against your circle:

  • If a ZIP's center point falls within the radius, the entire ZIP is included.
  • If the center point sits outside the radius, the ZIP is excluded — even if part of its actual area would overlap the circle. We don't render polygon boundaries, so we can't test for partial overlap.
  • For mailing or marketing use cases where any boundary overlap matters, draw your radius a little wider than the strict cutoff (1–2 miles in dense urban areas, more in rural ones).

When to Use Circular Radius Instead

For precise circular boundaries without zip code boundaries, use our main radius map tool. This is better for:

  • Defining service areas with exact distance limits
  • Compliance with regulations requiring specific mile limits
  • Geofencing applications
  • International locations (zip codes are US-only)

Zip Code Quick Reference

33,784
US ZIPs in this tool's database
5
Digits in a standard zip code
9
Digits in ZIP+4 format
10
Zip code regions (0-9)
1963
Year ZIP codes introduced
7,500
Avg. population per zip code

Zip Code Regions by First Digit

0 — Northeast (MA, ME, NH, VT, RI, CT, NJ)
1 — Northeast (NY, PA)
2 — Mid-Atlantic (DC, MD, VA, WV, NC)
3 — Southeast (FL, GA, AL, TN, MS)
4 — Midwest (IN, KY, MI, OH)
5 — Upper Midwest (IA, MN, MT, ND, SD, WI)
6 — Central (IL, KS, MO, NE)
7 — South Central (AR, LA, OK, TX)
8 — Mountain West (AZ, CO, ID, NM, NV, UT, WY)
9 — Pacific (AK, CA, HI, OR, WA)

Frequently Asked Questions

How many zip codes are in the database?
The database contains 33,784 ZIP code centroids covering all 50 states, DC, and US territories (American Samoa, Guam, Northern Marianas, Puerto Rico, US Virgin Islands). The source is the SimpleMaps US ZIPs Free dataset, built from the US Census Bureau's ZCTA file plus parent-ZCTA crosswalk entries. A small share of USPS ZIPs — single-recipient business ZIPs, some PO-box-only ZIPs, and retired ZIPs — lack a ZCTA and are not in the dataset. If you enter one of those, the tool tells you so rather than silently returning nothing.
Can I use postal codes outside the US?
Currently, this tool supports US zip codes only. For radius drawing in other countries (UK postcodes, Canadian postal codes, etc.), use our main radius map tool with an address search — it works worldwide but doesn't show postal code boundaries.
Can I export the zip code list?
Yes. Click “Export CSV” to download a spreadsheet with all zip codes within your radius. The file includes: zip code, city name, state abbreviation, and distance from your center point. This format is compatible with Excel, Google Sheets, and most CRM/mailing platforms.
Why are some borderline ZIP codes excluded from my results?
Each ZIP has a single center point (centroid) in the dataset. The radius test uses that one point: if the center is inside the circle, the ZIP is included; if it's outside, the ZIP is excluded — even if part of its actual area would overlap your radius. To capture edge ZIPs, increase your radius by a small margin (1–2 miles in dense urban areas, more in rural ones).
How is the center of a zip code determined?
The center point (centroid) comes from the SimpleMaps US ZIPs Free dataset, which derives it from the ZIP's ZCTA polygon (or, for ZIPs without their own ZCTA, the centroid of the parent ZCTA). For irregularly shaped ZIPs this may not align with the “main” town or commercial area, but it provides a consistent reference point for distance calculations.
What's the difference between ZIP codes and ZCTAs?
ZIP codes are USPS mail delivery routes — they define where mail carriers go, not specific areas. ZCTAs (Zip Code Tabulation Areas) are Census Bureau approximations that create boundary polygons around zip code areas. This tool uses ZCTA-derived center points (the latitude/longitude given to each zip code by the SimpleMaps US ZIPs Free dataset) for radius testing. In most cases, ZCTAs closely match ZIP codes; rural areas and dense urban cores have the most divergence.
Can I find zip codes within a drive time instead of distance?
This tool uses straight-line (as-the-crow-flies) radius. For drive-time based zones, use our drive time map tool, which calculates actual driving isochrones. Note that the drive time tool shows the reachable area, not specific zip codes.
Is the data free to use commercially?
Yes. The underlying ZCTA data is from the US Census Bureau and is public domain; the centroids used by this tool come from the SimpleMaps US ZIPs Free release, which permits commercial use with attribution. You can export and use the zip code lists for marketing campaigns, sales territory planning, and business analysis.

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