| City : | San Carlos I |
| County : | Webb County |
| State : | Texas (TX) |
| Land Area : | 0.13 sq mi |
| Water Area : | 0.00 sq mi |
| Latitude : | 27.4894888 |
| Longitude : | -99.3729265 |
| Population (2010): | 316 |
| Population Estimate (2012) : | 282 |
| Population Density : | 2,423.06/sq mi |
| Housing Units (2012) : | 88 |
| Median Household Income (2012) : | $16,719 (Texas : $51,563, USA : $53,046) |
| Median Family Income (2012) : | $16,719 (Texas : $60,621, USA : $64,585) |
| Median House Price (2012) : | $31,500 (Texas : $128,000, USA : $181,400) |
San Carlos I Zip Codes
| 78043 (42,713) |