ZIP Codes Near 78666 — San Marcos, TX
There are 26 ZIP codes within 25 miles of 78666, covering 20 cities and towns. Distances are straight-line between ZIP centroids, not driving distance.
Cities within 25 miles
| City | Distance | ZIP codes |
|---|---|---|
| Martindale, TX | 9.6 mi | 1 |
| Maxwell, TX | 10.3 mi | 1 |
| Staples, TX | 11.5 mi | 1 |
| Kyle, TX | 12.2 mi | 1 |
| Fentress, TX | 14.1 mi | 1 |
| New Braunfels, TX | 14.2 mi | 2 |
| Wimberley, TX | 15.0 mi | 1 |
| Fischer, TX | 15.3 mi | 1 |
| Buda, TX | 16.0 mi | 1 |
| Canyon Lake, TX | 16.0 mi | 1 |
| Driftwood, TX | 16.2 mi | 1 |
| Prairie Lea, TX | 17.8 mi | 1 |
| Lockhart, TX | 18.4 mi | 1 |
| Manchaca, TX | 18.8 mi | 1 |
| Kingsbury, TX | 19.0 mi | 1 |
| Mcqueeney, TX | 19.8 mi | 1 |
| Austin, TX | 21.0 mi | 6 |
| Luling, TX | 24.2 mi | 1 |
| Seguin, TX | 24.3 mi | 1 |
| Marion, TX | 24.7 mi | 1 |
All 26 ZIP codes, by distance
| ZIP | City | County | Distance |
|---|---|---|---|
| 78655 | Martindale, TX | Caldwell | 9.6 mi |
| 78656 | Maxwell, TX | Caldwell | 10.3 mi |
| 78670 | Staples, TX | Guadalupe | 11.5 mi |
| 78640 | Kyle, TX | Hays | 12.2 mi |
| 78622 | Fentress, TX | Caldwell | 14.1 mi |
| 78130 | New Braunfels, TX | Guadalupe | 14.2 mi |
| 78676 | Wimberley, TX | Hays | 15.0 mi |
| 78132 | New Braunfels, TX | Comal | 15.1 mi |
| 78623 | Fischer, TX | Comal | 15.3 mi |
| 78610 | Buda, TX | Hays | 16.0 mi |
| 78133 | Canyon Lake, TX | Comal | 16.0 mi |
| 78619 | Driftwood, TX | Hays | 16.2 mi |
| 78661 | Prairie Lea, TX | Caldwell | 17.8 mi |
| 78644 | Lockhart, TX | Caldwell | 18.4 mi |
| 78652 | Manchaca, TX | Travis | 18.8 mi |
| 78638 | Kingsbury, TX | Guadalupe | 19.0 mi |
| 78123 | Mcqueeney, TX | Guadalupe | 19.8 mi |
| 78739 | Austin, TX | Travis | 21.0 mi |
| 78737 | Austin, TX | Hays | 21.2 mi |
| 78748 | Austin, TX | Travis | 21.4 mi |
| 78747 | Austin, TX | Travis | 22.0 mi |
| 78749 | Austin, TX | Travis | 24.0 mi |
| 78648 | Luling, TX | Caldwell | 24.2 mi |
| 78155 | Seguin, TX | Guadalupe | 24.3 mi |
| 78124 | Marion, TX | Guadalupe | 24.7 mi |
| 78745 | Austin, TX | Travis | 24.9 mi |
How this list is calculated
Each ZIP code is represented by a single centroid point, and distance is measured great-circle from the centroid of 78666 to each of the others. Two consequences worth knowing about:
- Large rural ZIPs distort the picture. A ZIP covering 400 square miles has a centroid that may be 15 miles from its own nearest edge, so a code listed as 30 miles away can begin much closer.
- These are not driving distances. A river, a bay, or a mountain range makes a 12-mile straight line into a 40-minute drive. For service-area planning, use this as a first cut and check the routes.
If you need this programmatically — for a store locator, a delivery zone, or a territory map — the radius endpoint returns the same data as JSON, with an arbitrary radius and optional state filtering.
Back to 78666
County, time zone, area codes, and the full ZIP+4 lookup for any address in San Marcos.