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Idaho continues its migration from smaller to larger counties, with the state's overall population growing 1.2 percent between July 2014 and July 2015.
According to the latest statistics from the U.S. Census Bureau, much of the increase was concentrated in Ada, Canyon, Kootenai, Bonneville, Bannock and Twin Falls counties, representing 90 percent of the growth.
Ada County's population in July 2015 was 434,211, a gain of 7,364 in one year.
Canyon County's population in July 2015 was 207,478, a gain of 4,527.
Of those counties that lost population, Elmore County led the list, having a population of 25,876 in July 2015, a loss of 386.
The Census points to natural increases—births minus deaths—as a major component in population growth. Idaho saw 22,751 births between July 1, 2014 and July 1, 2015 and 11,826 deaths during the same period, resulting in an overall net gain of 10,925.