Nampa ( /næmpə/) is the largest and the fastest growing city in Canyon County, Idaho, USA. The population of Nampa was 81,557 at the 2010 census. 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.
Nampa began its life in the early 1880s when the Oregon Short Line Railroad built a line from Granger, Wyoming, to Huntington, Oregon. It passed through Nampa. More railroad lines sprang up running through Nampa, making it a very important railroad town. Alexander and Hannah Duffes established one of the town's first homesteads, eventually forming the Nampa Land and Improvement Company with the help of their friend and co-founder, James McGee. In spite of the name, many of the first settlers referred to the town as "New Jerusalem" because of the strong religious focus of its citizens. After only a year the town had grown from 15 homes to 50. As new amenities were added to the town, Nampa continued its growth and was incorporated in 1890.
Unlike most towns in that historic era with streets running true north and south, Nampa's historic roads run perpendicular to the railroad tracks that travel northwest to southeast through the town. Thus, the northside is really the northeast side of the tracks, and the southside is really the southwest side of the railroad tracks. Founder Alexander Duffes laid out Nampa's streets this way to prevent an accident like one that occurred earlier in a town he had platted near Toronto, Canada. In that town, a woman and her two children were killed by a train when they started across the railroad tracks in a buggy and the wheel got stuck. As the Oregon Short Line railroad originally bypassed Boise, Nampa has the fanciest of many railroad depots built in the area.