Alaska has by far the most coastline of any U.S. state, with over 33,000 miles of tidal shoreline, which is more than all the other states combined.

Quick Scoop

  • The state with the most coastline is Alaska , thanks to its long, jagged outline, countless bays, inlets, and islands.
  • NOAA‑based compilations list Alaska at about 33,904 miles of shoreline, while the next closest state, Florida, has roughly 8,400 miles.
  • When people casually guess “Florida” or “California,” they usually forget that Alaska’s fractured shape dramatically increases its measured shoreline length.

A tiny nuance

  • Some lists distinguish between simple “ocean coastline” and more detailed “tidal shoreline” that counts all the nooks, crannies, and islands.
  • Even with stricter definitions, Alaska still comes out as the state with the longest coastline in the United States.

TL;DR: If you’re asking “which US state has the most coastline,” the answer is Alaska, by a huge margin.

Information gathered from public forums or data available on the internet and portrayed here.