Yes, Nebraska shares a border with Missouri, which is to Nebraska's southeast, due east of Kansas. The other state east of Nebraska is Iowa, which is north of Missouri.
The state of Missouri is about 240 miles wide (east to west).
Illinois is farther east, as its western border is mostly on the east bank of the Mississippi River, while across the river to the west are Iowa and Missouri.
Iowa, Missouri, and Arkansas border the Mississippi River to the west.
The most southern state Iowa borders is Missouri. However, Missouri is a Midwestern state and not a Southern one.
Alaska
Missouri is north, and very slightly east of Arkansas. Kentucky and Illinois are actually northeast, but don't border Arkansas.
Iowa's southern border is with the state of Missouri.
North Carolina and Virginia border Tennessee in the east.
Mississippi river
Arkansas
Illinois and Missouri border one another, and therefore, there is no state in-between them. However, both Illinois and Missouri border the state of Iowa.