James Knox Polk (an haife shi a ranar 2 ga watan Nuwamba , shekarar 1795 - ya mutu a ranar 15 ga watan Yuni,shekarar 1849) shi ne Shugaban Amurka na 11. Ya yi wa'adi ɗaya kawai a matsayin shugaban ƙasa. Kafin ya zama shugaban ƙasa, ya kasance shugaban majalisar wakilai (1835-1839) da gwamnan Tennessee (1839-1841). James Knox Polk an haife shi a ranar 2 ga watan Nuwamba,shekarar 1795 a Pineville, North Carolina . Iyayensa sune Samuel Polk da Jane Gracey Polk. Mahaifin James wani Ba'amurke ne mai bincike, mai bayi, mai shuka, kuma ɗan kasuwa. Ba a san abin da mahaifiyarsa ta yi ba. Ana tunanin matar gida ce kawai. Yayi rashin lafiya sosai tun yana yaro, don haka bai yi aikin gona da yawa ba. An yi masa tiyata yana ɗan shekara 17 don cire duwatsun mafitsara . Maganin sa barci da aka ba ƙirƙira tukuna, sai ya kasance a farke dukkan tiyata. Ya kasance a cikin ƙungiyar muhawara a kwaleji. Polk yayi karatun lauya a gaban babban lauya Nashville . Sannan ya yi aiki a matsayin lauya kuma dan jiha .