Tornillo (/tɔːrˈniːjoʊ/ tor-NEE-yoh) is a census-designated place (CDP) and border town in El Paso County, Texas, United States. The population was 1,568 at the 2010 census. It is part of the El Paso Metropolitan Statistical Area. The Tornillo and Guadalupe, Chihuahua, area is connected by the Fabens–Caseta International Bridge.
The town is the home of Sonic Ranch, the world's largest residential recording complex. In June 2018, the US government opened a tent city detention camp for migrant children at the Marcelino Serna Port of Entry on the Mexican border in Tornillo. The ZIP Codes encompassing the CDP area are 79838 and 79853.