US regions 16 6, 10:43pm

The states they belong to or states that belong to them

South:
Florida, Georgia, North Carolina, South Carolina, Virginia,
and West Virginia, Alabama, Kentucky, Mississippi, and Tennessee, Arkansas, Louisiana, Oklahoma, and Texas

both: Deleware and Maryland

Northeast:
Connecticut, District of Columbia, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont
New Jersey, New York, and Pennsylvania

Midwest:
Illinois, Indiana, Michigan, Ohio, and Wisconsin, Iowa, Kansas, Minnesota, Missouri, Nebraska, North Dakota, and South Dakota

West:
Arizona, Colorado, Idaho, Montana, Nevada, New Mexico, Utah, and Wyoming
Alaska, California, Hawaii, Oregon, and Washington