Which U.S. state has the longest coastline?

Alaska has the longest coastline of any U.S. state, stretching over 6,640 miles. This extensive coastline is largely due to Alaska's geographic position and its numerous islands, fjords, and inlets. The state's unique shape and the presence of the Aleutian Islands, along with the rugged coastline formed by glacial activity, contribute to this remarkable length.

In contrast, while Florida, California, and Hawaii have significant coastlines, they do not come close to Alaska's vast measurement. Florida, for instance, boasts a coastline that is approximately 1,350 miles long, while California's coastline measures about 840 miles. Hawaii, consisting of several islands, has a combined coastline of approximately 1,200 miles. Alaska's sheer size and geographical features make it unparalleled in terms of coastline length among U.S. states.