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is a town in Maricopa County, Arizona, United States, in the Phoenix Metropolitan Area. According to 2006 Census Bureau estimates, the population of the town was 29,615. In July 2007,
ranked Buckeye as the 2nd-fastest growing municipality in the United States, having had its population grow by nearly 192% between 2000 and 2006.
According to the United States Census Bureau, the town has a total area of 145.8 square miles (377.5 km²), all of it land.
The town's very large planning area extends, at its widest points, 48 miles from north to south and 24 miles east to west. It borders the planning areas of Wickenburg to the north; Surprise, Glendale, and Goodyear to the east; and Gila Bend to the south. To the west is the unincorporated area known as Tonopah.