The U.S. state that borders only one other U.S. state is Maine.
Maine's Unique Geographical Position
Maine holds a distinctive place on the map of the United States due to its unique border configuration. It is the sole state within the U.S. that shares its land boundary with just one other American state.
- Bordering State: Maine borders exclusively with New Hampshire to its west.
- Other Boundaries: While its U.S. state border is singular, Maine also shares extensive international borders with Canada. To its north and northwest, it borders the Canadian province of Quebec, and to its east, it borders New Brunswick. The Atlantic Ocean defines its eastern and southern coasts.
This combination of a single U.S. state border, a lengthy international border, and an ocean coastline makes Maine's geographic profile quite distinctive among the 50 states.
State Border Overview
Most U.S. states share borders with multiple other states, often ranging from two to as many as eight (in the case of Missouri and Tennessee). This makes Maine's situation as the sole state bordering only one other particularly noteworthy.
Below is a simple representation of Maine's unique border relationship:
| State | Borders (U.S. States) |
|---|---|
| Maine | New Hampshire |
For more information on U.S. state geography and borders, you can refer to reputable sources such as National Geographic's United States maps and geographical information.
