Alamo, located in the Rio Grande Valley in what is nicknamed the "Land of Two Summers", is a city in the irrigated area of southern Hidalgo County, Texas, United States. Known as the "Refuge to the Valley", it is located in an area of abundant vegetable farming and citrus groves, and is a noted winter resort/retirement town near the Mexico-U.S. border. Alamo is one of the Rio Grande Valley's gateways to Mexico, via U.S. Route 281 and Nuevo Progreso, Tamaulipas, as well as a gateway to the Santa Ana National Wildlife Refuge. Alamo's population was 18,353 at the 2010 census and an estimated 19,910 in 2019.