Surprise is a city in Maricopa County, Arizona, USA. The population was 30,848 at the 2000 census, however rapid growth has boosted the city's population to 85,914 by the 2006 Census estimates. As such, it is the second fastest-growing municipality in the greater Phoenix metropolitan area, and between 1990 and 2000, it was the sixth fastest-growing place among all cities and towns in Arizona. Surprise apartments for rent comparison page shows most up to date rent information on Surprise apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.