Brownsville & Matamoros International Bridge, International border crossing between Brownsville, Texas and Matamoros, Mexico.

The Brownsville & Matamoros International Bridge spans the Rio Grande between Brownsville, Texas, and Matamoros, Tamaulipas. Its original 1910 steel swing bridge, built by the Wisconsin Bridge and Iron Company on concrete foundations by the Foundation Company of New York, still carries Union Pacific trains. A separate four-lane concrete toll bridge opened beside it in 1997 for cars, bicycles and pedestrians. A tan brick building at the site bears the inscription "BROWNSVILLE & MATAMOROS BRIDGE SYSTEM".

In 1909 the Brownsville and Matamoros Bridge Company, owned by the St. Louis, Brownsville and Mexico Railway and the Mexican National Railway, began work on a swing bridge; the mechanism was tested in July 1910 and never opened again. The 227-foot steel span opened on December 12, 1910, and was widened in 1953 and 1992. A separate four-lane concrete toll bridge opened alongside in 1997.

The bridge enables daily interactions between communities on both sides through commerce and family visits. People use it regularly to maintain their lives across both nations.

The original 1910 span now carries Union Pacific trains, while cars, cyclists and pedestrians use the adjacent four-lane Express Bridge opened in 1997. All truck traffic has been diverted to the Veterans and Los Indios crossings since 1999. Maintenance, security and toll collection are handled on the US side.

The bridge system comprises two historically different structures, with the older one serving rail traffic while the newer one consists of four lanes for cars. These side-by-side structures reveal the evolution of infrastructure across more than a century.