Los Arcos is a census-designated place (CDP) in Webb County, Texas, United States.

The CDP has a total area of 0.2 square miles (0.52 km2), all land.

[3] Los Arcos first appeared as a census designated place in the 2010 U.S.

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

[22] The designated community college for Webb County is Laredo Community College.