Idaho is among the few states in the nation without a major freeway linking the two largest metropolitan areas of Boise in the south and Coeur d'Alene in the north. US-95 links the two ends of the state, but like many other highways in Idaho, it is badly in need of repair and upgrade. In 2007, the Idaho Transportation Department stated that the state's highway infrastructure faces a $200 million per year shortfall in maintenance and upgrades. Interstate 84 is the main highway linking the Southeast and Southwest portions of the state, along with Interstate 86 and Interstate 15.
Major airports include the Boise International Airport serving the southwest region of Idaho, and the Spokane International Airport (actually located in Spokane, Washington), which serves northern Idaho. Other airports with scheduled service are the Pullman-Moscow Regional Airport serving the Palouse; the Lewiston-Nez Perce County Airport, serving the Lewis-Clark Valley and north central Idaho; The Magic Valley Regional Airport in Twin Falls; the Idaho Falls Regional Airport; and the Pocatello Regional Airport.
Idaho is served by two transcontinental railroads. The Burlington Northern Santa Fe (BNSF) connects North Idaho with Seattle, Portland and Spokane to the west, and Minneapolis and Chicago to the east. The BNSF travels through Kootenai, Bonner and Boundary Counties. The Union Pacific Railroad crosses southern Idaho traveling between Portland, Green River, WY, and Ogden, Utah and serves Boise, Nampa, Twin Falls, and Pocatello. Amtrak's Empire Builder crosses northern Idaho, with its only stop being in Sandpoint. There has been a push recently to return Amtrak service to southern Idaho as well.
The Port of Lewiston is the furthest inland Pacific port on the west coast. A series of dams and locks on the Snake River and Columbia River facilitate barge travel from here to Portland, where goods are loaded on ocean-going vessels.
As of 2005, Idaho has an estimated population of 1,429,096, which is an increase of 33,956, or 2.4%, from the prior year and an increase of 135,140, or 10.4%, since the year 2000. This includes a natural increase since the last census of 58,884 people (that is 111,131 births minus 52,247 deaths) and an increase due to net migration of 75,795 people into the state. Immigration from outside the United States resulted in a net increase of 14,522 people, and migration within the country produced a net increase of 61,273 people.
This made Idaho the sixth fastest-growing state after Arizona, Nevada, Florida, Georgia, and Utah. From 2004 to 2005, Idaho grew the third-fastest, surpassed only by Nevada and Arizona.
Nampa, the state's second largest city, has experienced particularly strong growth in recent years. According to census estimates Nampa has grown 22.1% to nearly 65,000 residents between 2000 and 2003. As of 2007, the population in Nampa was estimated at 84,000. Growth of 5% or more over the same period has also been observed in Caldwell, Coeur d'Alene, Meridian, Post Falls and Twin Falls.[6]
Since 1990, Idaho's population has increased by 386,000 (38%).
The Boise Metropolitan Area (officially known as the Boise City-Nampa, ID Metropolitan Statistical Area) is Idaho's largest metropolitan area. Other metropolitan areas in order of size are Coeur d'Alene, Idaho Falls, Pocatello and Lewiston.
As of 2006, six official micropolitan statistical areas are based in Idaho. Twin Falls is the largest of these.
The center of population of Idaho is located in Custer County, in the town of Stanley.
The largest reported ancestries in the state are: German (18.9%), English (18.1%), Irish (10%), American (8.4%), Norwegian (3.6%), Swedish (3.5%).
According to the 15th annual Idaho Public Policy study ([7], 2004) by the Social Science Research Center at BSU, the ambiguous religious affiliations of Idahoans break down roughly as follows.
The largest denominations by number of adherents in 2000 were the Church of Jesus Christ of Latter-day Saints with 311,425; the Roman Catholic Church with 130,847; the Assemblies of God with 18,745; and the United Methodist Church with 17,683.
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