▁ 2 9 7 , 9 2 8 ▁people ▁( that ▁is ▁ 5 6 4 , 0 6 2 ▁birth s ▁minus ▁ 2 6 6 , 1 3 4 ▁death s ) ▁and ▁an ▁increase ▁due ▁to ▁net ▁migration ▁of ▁ 7 4 5 , 9 4 4 ▁people ▁into ▁the ▁state . ▁Im m igration ▁from ▁outside ▁the ▁United ▁States ▁resulted ▁in ▁a ▁net ▁increase ▁of ▁ 2 0 4 , 6 6 1 ▁people , ▁and ▁migration ▁within ▁the ▁country ▁produced ▁a ▁net ▁increase ▁of ▁ 5 4 1 , 2 8 3 ▁people . ▁New ▁population ▁figures ▁for ▁the ▁year ▁ending ▁July ▁ 1 , ▁ 2 0 0 6 , ▁indicate ▁that ▁Arizona ▁is ▁the ▁fast est ▁growing ▁state ▁in ▁the ▁United ▁States , ▁with ▁ 3 . 6 % ▁population ▁growth ▁since ▁ 2 0 0 5 , ▁exceed ing ▁the ▁growth ▁of ▁the ▁previous ▁leader , ▁Nev ada . ▁The ▁most ▁recent ▁population ▁estimates ▁released ▁by ▁the ▁US ▁Census ▁put ▁the ▁population ▁at ▁ 6 , 8 2 8 , 0 6 5 ▁in ▁ 2 0 1 5 . ▁ ▁The ▁population ▁density ▁of ▁the ▁state ▁is ▁ 4 5 . 2 ▁people ▁per ▁square ▁mile . ▁In ▁ 2 0 1 0 , ▁there ▁were ▁an ▁estimated ▁ 4 6 0 , 0 0 0 ▁und ocument ed ▁imm igr ants ▁in ▁the ▁state . ▁These ▁constit uted ▁an ▁estimated ▁ 7 . 9 % ▁of ▁the ▁population . ▁ ▁The ▁center ▁of