Nampa is the largest and the fastest growing city in Canyon County, Idaho, USA. It is now the second largest in the state, passing the eastern Idaho cities of Idaho Falls and Pocatello in the late 1990s. Only the capital city, Boise, is larger. The population of Nampa was 51,867 at the 2000 census, and was estimated to be 79,249 as of July 1, 2007. Nampa is located about 20 miles (32 km) west of Boise along Interstate 84, and six miles (10 km) west of Meridian. Nampa is part of the Boise metropolitan area. The name "Nampa" came from a Shoshone word whose meaning is either moccasin or footprint.