San Carlos I Texas Map
Explore San Carlos I, Texas, with this interactive street and satellite map.
This page also offers TOPO MAPS — the official USGS topographic sheets — plus USGS aerial imagery, a labelled USNG grid overlay, a distance and bearing tool, and a GPS grid-reference readout. See How to Use This Map below.
Interactive Map of San Carlos I, Texas
How to Use This San Carlos I, Texas Map
This interactive map shows the street layout and satellite imagery for San Carlos I, Texas. Use the Map and Satellite buttons above to switch between street map and aerial imagery views. Use the + and − buttons to zoom in or out, or scroll your mouse wheel while holding the Control key to zoom. On a touchscreen, use a two-finger pinch gesture. Drag the map to pan to any area of Texas or beyond.
Click ⛶ Fullscreen to expand the map to fill your screen. To return to the normal page view, press the Escape key, click the ✕ Exit Fullscreen button that appears above the map, or on a mobile device tap the back button (Android) or the close icon (iOS).
TOPO MAPS — NEW. Click the green 🔍 Search Maps button below the map to open a second map with a Base map row offering three choices. OSM is the standard OpenStreetMap street map. Topo shows the official USGS topographic maps from The National Map — contours, hydrography, land cover and shaded relief, the same mapping used for hiking, hunting and back-country navigation in the Adirondacks, the Catskills and the Finger Lakes. Imagery shows USGS aerial photography, mostly 1-metre NAIP. The search box finds any US town, county or landmark by name, so you are not limited to San Carlos I.
Reading the map like a paper quad. Click Grid to overlay the U.S. National Grid (USNG), labelled along the edges exactly as a printed topographic sheet is — at normal zoom the squares are one kilometre across, so you can read a six-figure grid reference by eye and judge distance directly off the map. Click Measure, then tap two points, to get the distance between them together with the grid bearing in degrees and mils, the true bearing, and the magnetic bearing to set on a compass.
Click 📍 My position to take a single GPS reading from your device. It marks where you are and reports your position as a USNG grid reference as well as plain latitude and longitude — USNG being the format FEMA and US search and rescue teams work from — with a Copy position button so you can paste it straight into a text message. It takes one reading and stops, rather than tracking continuously, to conserve your battery. Note that map tiles need cell coverage, but a GPS reading does not — your coordinates stay correct even where the map itself cannot load.
| City | San Carlos I |
| State | Texas (TX) |
| County | Webb County |
| Country | United States of America |
| Timezone | Central Time (America/Chicago) |
| Latitude | 27.4906 |
| Longitude | -99.3726 |
| Population | 187 |
| Density | 542.9 /km² |
| Incorporated | N/A |
| ZIP Code | 78043 |
| Area Code | 210, 726 |
| County Seat | Laredo |
| School District | United Independent School District |
About San Carlos I, Texas
San Carlos I is a locality in Webb County, Texas, United States. It is a small community with a population of 187. The population density is 542.9 people per km². San Carlos I is located at 27.4906°N, 99.3726°W. It observes the Central Time (America/Chicago) timezone. ZIP code: 78043.San Carlos I occupies a stretch of sun-bleached earth where the horizon pulls tight against the sky, defined by the dry, restless breath of the brush country. It lies 8.3 miles east of Laredo, TX (from Laredo, TX: bearing 97°T), and is situated 10.9 miles northeast of Rio Bravo. The terrain unfolds as a series of low, scrub-dusted swells, broken only by the intermittent shade of mesquite and the occasional reach of Dolores Creek as it carves a shallow, vein-like path through the silt two miles away. Beyond the immediate perimeter, the land stretches out in a pale, dusty expanse, occasionally punctuated by the silhouette of El Pico rising fifteen miles distant, a faint, jagged reminder of the earth’s upheaval. When the light shifts toward evening, the dust particles catch the sun, turning the atmosphere into a thick, amber haze that softens the hard edges of the fence lines and the weathered, sun-baked soil.
San Carlos I carries the quiet, persistent character of a place built upon the labor of the land and the stubbornness of those who settled the surrounding plains. The local economy remains tethered to the rhythms of the region, where the work is often solitary and dictated by the seasonal shifts of the soil. Residents find a modest reprieve at Self-Help Center Park, a small patch of managed green that offers a point of assembly under the wide, unblinking dome of the Texas sky. Life here moves with a deliberate, measured cadence, far removed from the frantic pace of larger hubs, finding its own stability in the proximity of Lake Casa Blanca, where the water provides a rare, reflective stillness against the backdrop of the arid brush.
Nearby Outdoor Places
- Self-Help Center Park (Local Park) — 1.7 mi, 096° E
- Campo Real (Local Recreation) — 3.5 mi, 259° W
- Recreational Area (Local Recreation) — 3.8 mi, 319° NW
- Derby Downs (Local Park) — 4.4 mi, 321° NW
- Lake Casa Blanca State Park (State Park) — 4.5 mi, 310° NW
- Deaf Smith (Monument) — 5.9 mi, 305° NW
- Laredo Air Force Base (Monument) — 6.3 mi, 306° NW
- Carlos Rene & Raquel G. Ramirez WIC Clinic and Health Center Mural (Public Artwork) — 6.3 mi, 260° W
- Radcliffe Killam (Monument) — 6.9 mi, 326° NW
- Washington's Birthday Celebration Museum (Museum) — 8.2 mi, 276° W
- Los Olvidados Art Gallery (Gallery) — 8.3 mi, 276° W
- River Bend Park (Local Conservation Area) — 8.9 mi, 273° W
- Fort McIntosh (Historic Castle / Fort) — 9.2 mi, 277° W
- Star Fort, Fort McIntosh (Historic Castle / Fort) — 9.3 mi, 280° W
- La Paz Museum (Museum) — 22.3 mi, 173° S
- Falcon State Park (State Park) — 63.6 mi, 167° S
- Lower Rio Grande Valley National Wildlife Refuge (National Wildlife Refuge) — 66.4 mi, 167° S · 277k acres
- Roma Historical Museum (Museum) — 67.2 mi, 159° S
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About This San Carlos I Map Page
This page provides an embedded street and satellite map of San Carlos I, Texas. Coordinates: 27.4906, -99.3726. Live weather conditions are sourced directly from the National Weather Service. Real-time local and world news feeds keep the page current.
Detailed location data for San Carlos I includes the ZIP code (78043), telephone area code (210, 726), county seat of Webb County (Laredo), and school district assignment (United Independent School District).
Search Maps opens a second, independent map. It searches OpenStreetMap for any US town, county or landmark by name; offers USGS topographic maps and USGS aerial imagery as base layers; overlays a labelled U.S. National Grid (USNG) so the map can be read like a printed topographic quad; measures distance and grid, true and magnetic bearings between any two points; and takes a single GPS fix reporting your position as a USNG grid reference and as latitude and longitude. Map tiles require cell coverage, but a GPS position does not, so the coordinates remain correct even where the map cannot load.
Location data is drawn from the USGS Geographic Names Information System (GNIS) and cross-verified against 2020 US Census records by coordinate proximity. Population figures are sourced from the 2020 US Census.
| Page generated | September 2026 |
| Location data | SimpleMaps US Cities Database; coordinates matched to USGS GNIS definitive data |
| Map layers | Google Maps; © OpenStreetMap contributors; USGS The National Map topographic and aerial imagery (public domain); magnetic declination from NOAA NCEI (World Magnetic Model) |
| Wikipedia validation | Article content matched to USGS GNIS coordinates via Wikipedia geosearch API. |
