Pick any US state and see its neighbors with approximate shared border lengths.
How this tool works
Computed the same way as the country version, from Census state boundaries: pick a state to see every neighbor and roughly how much border they share, plus the state's total border length.
What you can do with it
- Look up which states border any state, with lengths
- Settle which states have the most neighbors (Missouri and Tennessee, 8 each)
- Compare shared borders, like Texas-Oklahoma versus Texas-New Mexico
- Use it for reference in articles and trivia
Why use it
State adjacency is a classic reference question, and the border lengths turn a yes-or-no answer into something genuinely informative.
Data sources and methods
- US Census Bureau cartographic boundary files (2023)
Coverage note: States that touch only at a corner point, like Arizona and Colorado at Four Corners, share zero border length and may not appear as neighbors.
Related tools
These tools are provided for educational and informational purposes only. Results are computed from simplified public data and standard formulas, and may differ from surveyed or official values. No warranty is given as to accuracy or completeness, and the tools should not be relied on for navigation, legal, or commercial purposes.