盖兹登购地（Gadsden Purchase）指的是位于现在美利坚合众国亚利桑那州及新墨西哥州两州南部的一块土地。面积大约30,000平方英里（77,700平方公里）。这块土地是于1853年，美国从墨西哥手中购入的。购买的目的是为了建设大陆横断铁路的美国南部路线，以及清偿墨西哥对美国的巨额债务。最终，美国花费1000万美元，购得了这块土地。

The Gadsden Purchase (known in Mexico as Spanish:Venta de La Mesilla, "Sale of La Mesilla") is a 29,640-square-mile (76,800 km) region of present-day southern Arizona and southwestern New Mexico that was purchased by the United States in a treaty signed on December 30, 1853 by James Gadsden who was the American ambassador to Mexico at that time. It was then ratified, with changes, by the U.S. Senate on April 25, 1854, and signed by 14th President Franklin Pierce, with final approval action taken by Mexico's government and their General Congress or Congress of the Union on June 8, 1854. The purchase was the last territorial acquisition in the contiguous United States to add a large area to the country.