▁cap ita ▁income ▁for ▁the ▁city ▁was ▁$ 2 1 , 4 0 7 . ▁ 7 . 4 % ▁of ▁the ▁population ▁and ▁ 5 . 2 % ▁of ▁families ▁were ▁below ▁the ▁pover ty ▁line . ▁Out ▁of ▁the ▁total ▁people ▁living ▁in ▁pover ty , ▁ 9 . 5 % ▁were ▁under ▁the ▁age ▁of ▁ 1 8 ▁and ▁ 5 . 8 % ▁were ▁ 6 5 ▁or ▁older . ▁ ▁There ▁are ▁a ▁number ▁of ▁distingu ishing ▁characteristics ▁about ▁Warren ▁which ▁render ▁it ▁unique ▁among ▁American ▁cities ▁of ▁its ▁relative ▁size . ▁Warren ▁was ▁one ▁of ▁the ▁fast est - g row ing ▁municipal ities ▁in ▁the ▁country ▁between ▁ 1 9 4 0 ▁and ▁ 1 9 7 0 , ▁roughly ▁dou bling ▁its ▁population ▁every ▁ 1 0 ▁years . ▁In ▁ 1 9 4 0 ▁the ▁official ▁population ▁of ▁Warren ▁Township ▁was ▁ 2 2 , 1 4 6 ; ▁in ▁ 1 9 5 0 , ▁it ▁was ▁ 4 2 , 6 5 3 ; ▁in ▁ 1 9 6 0 , ▁after ▁Warren ▁Township ▁had ▁become ▁the ▁City ▁of ▁Warren , ▁population ▁had ▁ris en ▁to ▁ 8 9 , 2 4 0 ; ▁and ▁by ▁ 1 9 7 0 ▁it ▁had ▁grown ▁to ▁ 1 7 9 , 2 6 0 . ▁ ▁Since ▁ 1 9 7 0 , ▁Warren ▁has ▁been ▁consist ently ▁one ▁of ▁the ▁faster - decl ining ▁cities ▁in ▁population ▁in ▁the ▁country . ▁The