San Carlos II is a census-designated place (CDP) in Webb County, Texas, United States.

[3] San Carlos II is located at 27°29′24″N 99°22′6″W / 27.49000°N 99.36833°W / 27.49000; -99.36833 (27.490038, -99.368387).

The CDP has a total area of 0.1 square miles (0.26 km2), all land.

[4] San Carlos II first appeared as a census designated place in the 2010 U.S. Census, one of nine CDPS (La Coma, Laredo Ranchettes West, Los Altos, Ranchitos East, San Carlos I, San Carlos II, Tanquecitos South Acres, Tanquecitos South Acres II, and Pueblo Nuevo) from parts of Laredo Ranchettes CDP.

[17] Residents are in the United Independent School District.