Original: Missouri is the only state in the Union to have two Federal Reserve Banks : one in Kansas City ( serving western Missouri , Kansas , Nebraska , Oklahoma , Colorado , northern New Mexico , and Wyoming ) and one in St. Louis ( serving eastern Missouri , southern Illinois , southern Indiana , western Kentucky , western Tennessee , northern Mississippi , and all of Arkansas ) .
Simplified: Missouri 's edges touch a total of eight states . It is touched on the north by Iowa ; on the east , across the Mississippi River , by Illinois , Kentucky , and Tennessee ; on the south by Arkansas ; and on the west by Oklahoma , Kansas , and Nebraska ( Kansas and Nebraska are across the Missouri River ) .