The Ojinaga Cut was a parcel of land between Ojinaga, Chihuahua, and Presidio, Texas, that gave rise to an international border dispute between the United States and Mexico when the Rio Grande (Río Bravo del Norte) changed course.
The situation was similar to the better known Chamizal dispute between El Paso, Texas, and Ciudad Juárez, Chihuahua. The Ojinaga conflict was resolved by the Boundary Treaty of 1970. The U.S. ceded 1,607 acres (6.50 km2) and Mexico ceded 252 acres (1.02 km2). The land that changed possession became known as the Ojinaga Cut.