| Northeast | New England | Connecticut, Maine,
Massachusetts, New Hampshire, Vermont, and Rhode Island |
| Middle Atlantic | New Jersey, New York, and Pennsylvania |
| Midwest | East North Central | Illinois, Indiana, Michigan, Ohio, and Wisconsin |
| West North Central | Iowa, Kansas, Minnesota, Missouri, Nebraska, North Dakota, and South Dakota |
| South | South Atlantic | Delaware, District of Columbia, Florida, Georgia, Maryland, North Carolina, South Carolina, Virginia, and West Virginia |
| East South Central | Alabama, Kentucky, Mississippi, and Tennessee |
| West South Central | Arkansas, Louisiana, Oklahoma, and Texas |
| West | Mountain | Arizona, Colorado, Idaho, Montana, Nevada, New Mexico, Utah, and Wyoming |
| Pacific | Alaska, California, Hawaii, Oregon, and Washington |
| Contiguous States | Refers to the states that are in physical contact with the selected state. In other words, they are the "neighboring" or "surrounding" states for the selected state. |