Mier, also known as El Paso del Cántaro, is a city in Mier Municipality in Tamaulipas, located in northern Mexico near the Rio Grande, just south of Falcon Dam. It is 90 miles northeast of Monterrey on Mexican Federal Highway 2. In 1990, the population was recorded at 6,190. By the 2010 census, it had dropped to 4,762 inhabitants. It has an agricultural economy centered on cotton, sugar cane, corn, and livestock.