▁that ▁only ▁one ▁house ▁was ▁on ▁the ▁island . ▁ ▁The ▁only ▁road ▁sign ▁on ▁it ▁uses ▁the ▁Nem aha ▁County ▁street ▁grid ▁of ▁ 6 4 7 A ▁Avenue ▁and ▁ 7 3 9 A ▁Road ▁rather ▁than ▁the ▁At ch ison ▁County , ▁Missouri ▁grid ▁which ▁surr ounds ▁it . ▁ ▁The ▁island ▁was ▁all ud ed ▁to ▁but ▁not ▁mentioned ▁by ▁name ▁in ▁the ▁X K CD ▁cart oon ▁" R iver ▁Border " ▁on ▁ 2 7 ▁April ▁ 2 0 1 8 . ▁ ▁Name ▁The ▁island ▁der ives ▁its ▁name ▁from ▁the ▁McK iss ick ▁family , ▁who ▁bought ▁land ▁in ▁the ▁area ▁in ▁the ▁ 1 8 4 0 s ▁before ▁Missouri ' s ▁borders ▁with ▁Neb r aska ▁and ▁Iowa ▁had ▁been ▁final ized ▁with ▁those ▁states ' ▁entry ▁into ▁the ▁union . ▁ ▁The ▁family ▁were ▁among ▁the ▁first ▁sett lers ▁of ▁F rem ont ▁County , ▁Iowa , ▁where ▁they ▁founded ▁McK iss ick ' s ▁Gro ve ▁about ▁one ▁mile ▁north ▁of ▁the ▁McK iss ick ▁Island , ▁thinking ▁it ▁was ▁in ▁Missouri . ▁ ▁When ▁Iowa ▁entered ▁the ▁union ▁in ▁ 1 8 4 6 , ▁that ▁gro ve ▁near ▁today ' s ▁Hamburg , ▁Iowa ▁was ▁determined ▁to ▁be ▁in ▁Iowa . ▁ ▁The ▁McK iss icks ▁moved ▁to ▁California ▁in ▁ 1 8 6 1 . ▁ ▁The ▁island ▁is ▁officially ▁called ▁McK iss ick ▁Island ▁on ▁the ▁Geographic ▁Names ▁Information ▁System . ▁The ▁island ▁is ▁n ortheast ▁of