The map above is centered on San Antonio, United States, near Main Plaza (San Fernando Cathedral), with a default 12 mi radius. Drag to move it, search for a different address, or change the radius and unit using the controls.
A 12-mile radius from Main Plaza (San Fernando Cathedral) reaches the inner suburbs immediately north and northeast, including Olmos Park (~4 miles north), Alamo Heights (~4 miles northeast), Castle Hills (~7 miles north), and Shavano Park (~12 miles north)—but misses outer suburbs like Converse (~13 miles northeast), Live Oak (~14 miles northeast), Universal City (~15 miles northeast), and Schertz (~16 miles northeast). If a radius seems to cover less than you expected, switch to the drive-time map to understand real commute patterns. Distances here are straight-line from Main Plaza (San Fernando Cathedral) — the same way the radius map measures them.
Population
1,434,625 (2020 Census)
Country
United States
Coordinates
29.4252, -98.4946
Time zone
America/Chicago
Population figure: U.S. Census Bureau, 2020 Census Redistricting Data (P.L. 94-171), Table P1.
A 12-mile radius from Main Plaza (San Fernando Cathedral) reaches the inner suburbs including Alamo Heights (~4 miles northeast) and Castle Hills (~7 miles north), while nearby Hill Country gateways like Boerne (~29 miles northwest) sit well outside it.
Also known as: SA, San Antone, Alamo City, Military City USA.
What's within each radius from Main Plaza (San Fernando Cathedral)
Coverage at common radii, including notable places that fall just outside the circle. Use these as a quick reference — check exact boundaries before relying on a circle for real-estate, retail, or service-area decisions.
Place locations: USGS GNIS and GeoNames (CC BY 4.0). Distances are straight-line (great-circle) from Main Plaza (San Fernando Cathedral), the same way the radius map measures them.
5 miles from Main Plaza (San Fernando Cathedral)
A 5-mile radius from Main Plaza (San Fernando Cathedral) covers downtown and the nearby River Walk, the historic districts just south, and the northern inner core, reaching Olmos Park (~4 miles north) and Alamo Heights (~4 miles northeast).
Inside the circle
✓River Walk and downtown
✓The Majestic Theatre and historic downtown neighborhoods
✓Olmos Park (~3.7 miles north)
✓Alamo Heights (~4.5 miles northeast)
Just outside
✗Balcones Heights (~5.5 miles northwest)
✗Castle Hills (~6.9 miles north)
10 miles from Main Plaza (San Fernando Cathedral)
A 10-mile radius reaches Olmos Park, Alamo Heights, Balcones Heights (~6 miles northwest), and Castle Hills (~7 miles north), taking in most Northside and Northeast residential areas but stopping short of Shavano Park (~12 miles north).
Inside the circle
✓Most Northside and Northeast residential areas
✓Olmos Park (~3.7 miles north)
✓Alamo Heights (~4.5 miles northeast)
✓Balcones Heights (~5.5 miles northwest)
✓Castle Hills (~6.9 miles north)
Just outside
✗Shavano Park (~12 miles north)
12 miles (default) from Main Plaza (San Fernando Cathedral)
The default 12-mile radius reaches Shavano Park (~12 miles north) along with the inner suburbs, but stops short of the northeast suburbs along the Interstate 35 corridor such as Converse (~13 miles northeast) and Schertz (~16 miles northeast).
Inside the circle
✓Olmos Park (~3.7 miles north)
✓Alamo Heights (~4.5 miles northeast)
✓Balcones Heights (~5.5 miles northwest)
✓Castle Hills (~6.9 miles north)
✓Shavano Park (~12 miles north)
Just outside
✗Converse (~13 miles northeast)
✗Live Oak (~14 miles northeast)
✗Universal City (~15 miles northeast)
✗Schertz (~16 miles northeast)
✗Bulverde (~22 miles north)
25 miles from Main Plaza (San Fernando Cathedral)
A 25-mile radius extends well beyond the immediate suburbs, taking in the northeast corridor through Converse, Live Oak, Universal City, Schertz, and Bulverde (~22 miles north), but does not yet reach Boerne (~29 miles northwest) or New Braunfels (~29 miles northeast).
Inside the circle
✓Olmos Park (~3.7 miles north)
✓Alamo Heights (~4.5 miles northeast)
✓Balcones Heights (~5.5 miles northwest)
✓Castle Hills (~6.9 miles north)
✓Shavano Park (~12 miles north)
✓Converse (~13 miles northeast)
✓Live Oak (~14 miles northeast)
✓Universal City (~15 miles northeast)
✓Schertz (~16 miles northeast)
✓Bulverde (~22 miles north)
Just outside
✗Boerne (~29 miles northwest)
✗New Braunfels (~29 miles northeast)
✗Gruene (~32 miles northeast)
✗San Marcos (~46 miles northeast)
✗Wimberley (~46 miles northeast)
✗Blanco (~47 miles north)
50 miles from Main Plaza (San Fernando Cathedral)
A 50-mile radius from Main Plaza (San Fernando Cathedral) reaches the nearer Hill Country gateways and towns along the Interstate 35 corridor, including Boerne (~29 miles northwest), New Braunfels (~29 miles northeast), San Marcos (~46 miles northeast), and Wimberley (~46 miles northeast), while Kerrville (~58 miles northwest) and Austin (~74 miles northeast) remain outside.
Inside the circle
✓Olmos Park (~3.7 miles north)
✓Alamo Heights (~4.5 miles northeast)
✓Balcones Heights (~5.5 miles northwest)
✓Castle Hills (~6.9 miles north)
✓Shavano Park (~12 miles north)
✓Converse (~13 miles northeast)
✓Live Oak (~14 miles northeast)
✓Universal City (~15 miles northeast)
✓Schertz (~16 miles northeast)
✓Bulverde (~22 miles north)
✓Boerne (~29 miles northwest)
✓New Braunfels (~29 miles northeast)
✓Gruene (~32 miles northeast)
✓San Marcos (~46 miles northeast)
✓Wimberley (~46 miles northeast)
✓Blanco (~47 miles north)
Just outside
✗Kerrville (~58 miles northwest)
✗Johnson City (~59 miles north)
✗Austin (~74 miles northeast)
How San Antonio radius maps get used
City-specific scenarios where a radius is the right tool — and a sensible radius to start with.
Home search near a military base
To narrow neighborhoods around a duty station, start by drawing a 10-15 mile straight-line radius from the base, then switch to the drive-time map to check realistic commutes at rush hour before settling on an area.
Suggested starting radius: 10–15 miles straight-line, then validate with drive-time from base
Hill Country day-trip and destination planning
San Antonio sits at the southern edge of the Hill Country. Boerne (~29 miles northwest) and Wimberley (~46 miles northeast) are popular destinations that fall inside a 25-50 mile radius. Draw a circle in that range, then use the drive-time map to estimate how far your customers or visitors would actually travel.
Suggested starting radius: 25–50 miles from downtown (Boerne at ~29 miles, Wimberley at ~46 miles)
Service-area coverage planning
To map a service area for a clinic, store, or local business, draw a radius from your location and compare how much of the metro it captures. A 10-mile radius reaches the inner city and suburbs like Castle Hills (~7 miles north); extend to 25 miles to include the northeast suburbs like Schertz (~16 miles northeast). Pair the radius with the drive-time map to see real reach.
Suggested starting radius: 10 miles (inner city), 25 miles (outer suburbs)
Geographic quirks of San Antonio radius mapping
Local geography and infrastructure that change how a radius behaves here. Skipping these is the most common reason a radius decision goes sideways.
A small radius covers less than you'd expect
A 5-mile radius from Main Plaza (San Fernando Cathedral) reaches the nearest neighborhoods like Olmos Park (~4 miles north) and Alamo Heights (~4 miles northeast), while suburbs such as Castle Hills (~7 miles north) sit outside it. For a fuller picture of the metro, you often need a 12-mile radius or larger, or the drive-time map.
The northwest leads to the Hill Country
Draw any radius and you'll notice the contrast by direction: northwest toward the Hill Country reaches Boerne (~29 miles northwest) and rolling terrain, while the northeast runs along the Interstate 35 corridor through suburbs like Schertz (~16 miles northeast) and on to New Braunfels (~29 miles northeast). The Hill Country is often the most scenic direction from San Antonio.
FAQ — Radius mapping in San Antonio
How big is a 12-mile radius in San Antonio?
A 12-mile radius from Main Plaza (San Fernando Cathedral) reaches Olmos Park (~4 miles north), Alamo Heights (~4 miles northeast), Castle Hills (~7 miles north), and Shavano Park (~12 miles north), covering much of the inner suburban ring. It stops short of the northeast suburbs: Converse (~13 miles northeast), Live Oak (~14 miles northeast), Universal City (~15 miles northeast), and Schertz (~16 miles northeast) all fall just outside.
What's within 5 miles of downtown San Antonio?
A 5-mile radius covers downtown, the River Walk, the historic districts, Olmos Park (~4 miles north), and Alamo Heights (~4 miles northeast). You're still firmly in the urban core—this doesn't yet reach Castle Hills (~7 miles north) or most suburbs.
Is Boerne within 12 miles of downtown San Antonio?
No. Boerne is approximately 29 miles northwest of Main Plaza (San Fernando Cathedral)—well outside a 12-mile radius. It falls within a 25-50 mile radius, not the 12-mile default, so use a larger circle or the drive-time map for Hill Country planning.
Why does a radius in San Antonio seem to cover less than in other big cities?
A given radius can capture fewer named suburbs than you might expect—a 10-mile circle from Main Plaza reaches Castle Hills (~7 miles north) but not the northeast suburbs like Schertz (~16 miles northeast). Pair the radius with the drive-time map to understand real reach.
What's the best radius for finding a home close to a military base?
Start with a 10-15 mile straight-line radius from your duty station to see possible neighborhoods, then validate with a drive-time map at realistic commute hours. Draw the radius from the specific base you care about rather than from downtown.
How far is it to the Hill Country from downtown San Antonio?
Boerne, a common Hill Country gateway, is approximately 29 miles northwest. Wimberley, another popular destination, is about 46 miles northeast. A 12-mile radius does not reach the Hill Country, and a 25-mile radius still misses most of these towns—use a 25-50 mile radius or the drive-time map for Hill Country planning.
What suburbs fall within a 25-mile radius of downtown?
A 25-mile radius includes the inner suburbs plus the northeast corridor: Converse (~13 miles northeast), Live Oak (~14 miles northeast), Universal City (~15 miles northeast), Schertz (~16 miles northeast), and Bulverde (~22 miles north). To the northwest it approaches but does not reach Boerne (~29 miles northwest). This is roughly the metropolitan commute zone, not yet the Hill Country destinations.
See also
Radius Map Use Cases — how real estate, delivery, retail, event planning, marketing, and sales-ops teams use radius maps in practice.
Map & Radius Glossary — plain-English definitions of isochrone, geofence, geocoding, KML, and 40+ other terms used on this page.