| Border States | State |
|---|
| Alabama, Arkansas, Georgia, Kentucky, Mississippi, Missouri, North Carolina, Virginia | |
| Arkansas, Illinois, Iowa, Kansas, Kentucky, Nebraska, Oklahoma, Tennessee | |
| Arizona*, Kansas, Nebraska, New Mexico, Oklahoma, Utah, Wyoming | |
| Illinois, Indiana, Missouri, Ohio, Tennessee, Virginia, West Virginia | |
| Louisiana, Mississippi, Missouri, Oklahoma, Tennessee, Texas | |
| Arizona, Colorado, Idaho, Nevada, New Mexico*, Wyoming | |
| Arkansas, Colorado, Kansas, Missouri, New Mexico, Texas | |
| Colorado, Idaho, Montana, Nebraska, South Dakota, Utah | |
| Colorado, Iowa, Kansas, Missouri, South Dakota, Wyoming | |
| Delaware, Maryland, New Jersey, New York, Ohio, West Virginia | |
| Illinois, Missouri, Minnesota, Nebraska, South Dakota, Wisconsin | |
| Iowa, Minnesota, Montana, Nebraska, North Dakota, Wyoming | |
| Montana, Nevada, Oregon, Utah, Washington, Wyoming | |
| Alabama, Florida, North Carolina, South Carolina, Tennessee | |
| Arizona, California, Idaho, Oregon, Utah | |
| Alabama, Arkansas, Louisiana, Tennessee | |
| Arizona, Colorado, Oklahoma, Texas, Utah* | |
| California, Colorado*, Nevada, New Mexico, Utah | |
| Connecticut, Massachusetts, New Jersey, Pennsylvania, Vermont | |
| Connecticut, New Hampshire, New York, Rhode Island, Vermont | |
| Indiana, Iowa, Kentucky, Missouri, Wisconsin | |
| Indiana, Kentucky, Michigan, Pennsylvania, West Virginia | |
| Kentucky, Maryland, North Carolina, Tennessee, West Virginia | |
| Kentucky, Maryland, Ohio, Pennsylvania, Virginia | |
| Arkansas, Louisiana, New Mexico, Oklahoma | |
| | Border States | State |
|---|
| California, Idaho, Nevada, Washington | |
| Colorado, Missouri, Nebraska, Oklahoma | |
| Delaware, Pennsylvania, Virginia, West Virginia | |
| Florida, Georgia, Mississippi, Tennessee | |
| Georgia, South Carolina, Virginia, Tennessee | |
| Idaho, North Dakota, South Dakota, Wyoming | |
| Illinois, Iowa, Michigan, Minnesota | |
| Illinois, Kentucky, Michigan, Ohio | |
| Iowa, North Dakota, South Dakota, Wisconsin | |
| Arizona, Nevada, Oregon | |
| Arkansas, Mississippi, Texas | |
| Delaware, New York, Pennsylvania | |
| Indiana, Ohio, Wisconsin | |
| Maine, Massachusetts, Vermont | |
| Maryland, New Jersey, Pennsylvania | |
| Massachusetts, New Hampshire, New York | |
| Massachusetts, New York, Rhode Island | |
| Minnesota, Montana, South Dakota | |
| Alabama, Georgia | |
| Connecticut, Massachusetts | |
| Georgia, North Carolina | |
| Idaho, Oregon | |
| New Hampshire | |
| none (only borders Canada) | |
| none (islands) | |
|
World's Longest Borders 
Bordering States/Provinces 
Populated Neighboring Countries
