San Andres or San Andrés Formation may refer to: San Andres Formation, United States, a Permian geologic formations of the southwestern United States San Andrés Formation, Argentina, a Late Pliocene to Early Pleistocene geologic formation of Argentina San Andrés Formation, Colombia, a Miocene geologic formation of San Andrés Island, Colombia San Andrés Sandstone, a Paleogene geologic formation of Colombia