Humanities › Geography States With the Longest Shorelines Share Flipboard Email Print Alexander Spatari/Getty Images Geography Physical Geography Basics Political Geography Population Country Information Key Figures & Milestones Maps Urban Geography By Matt Rosenberg Geography Expert M.A., Geography, California State University - Northridge B.A., Geography, University of California - Davis Matt Rosenberg is an award-winning geographer and the author of "The Handy Geography Answer Book" and "The Geography Bee Complete Preparation Handbook." our editorial process Matt Rosenberg Updated October 23, 2019 The United States is home to 50 different states that vary greatly in size, topography, and even in climate, due to the range of latitudes among them. Nearly half of the states of the United States are not landlocked and border the Atlantic Ocean (or its Gulf of Mexico), the Pacific Ocean, and even the Arctic Sea. Twenty-three states are adjacent to an ocean, while 27 states are landlocked. The following list of the states with the 10 longest coastlines in the United States is arranged by length. Numbers can vary across sources, as the length of a coastline depends on how detailed the measurements are around each inlet and bay and whether all the islands are counted (such as in Alaska and Florida's figures). Figures can also change often due to flooding, erosion, and rising sea levels. The statistics here come from World Atlas.com. 01 of 10 Alaska Chavalit Likitratcharoen / EyeEm/Getty Images Length: 33,904 mi (54,563 km)Bordering: The Pacific Ocean and the Arctic Ocean If you measure just the coast, Alaska has 6,640 miles of coastline; if you measure all inlets and bays, it's more than 47,000 miles. 02 of 10 Florida ©thierrydehove.com/Getty Images Length: 8,436 mi (13,576 km)Bordering: The Atlantic Ocean and the Gulf of Mexico No matter where you are in Florida, you're never more than an hour and a half from the beach. 03 of 10 Louisiana zodebala/Getty Images Length: 7,721 mi (12,426 km)Bordering: The Gulf of Mexico The United States Geological Survey has found that Louisiana's barrier islands erode up to 66 feet (20 m) per year; these protect fragile wetlands from being inundated with saltwater, protect the coast from erosion, and dampen the force of waves that come inland from hurricanes and storms. 04 of 10 Maine Photography by Deb Snelson/Getty Images Length: 3,478 mi (5,597 km)Bordering: The Atlantic Ocean If all the miles of Maine's 3,000+ islands were taken into account, Maine would have more than 5,000 miles of coastline. 05 of 10 California Brian Eden/Getty Images Length: 3,427 mi (5,515 km)Bordering: The Pacific Ocean Most of California's coast is rocky; the beaches made famous in all those '60s movies are only along the southern coast of the state. 06 of 10 North Carolina W. Drew Senter, Longleaf Photography/Getty Images Length: 3,375 mi (5,432 km)Bordering: The Atlantic Ocean North Carolina hosts the Atlantic Coast's largest estuary for breeding shellfish and fish, at 2.5 million acres (10,000 sq km). 07 of 10 Texas Stephen Saks/Getty Images Length: 3,359 mi (5,406 km)Bordering: The Gulf of Mexico Millions of migrating birds take refuge in the Texas coastal wetlands in the winter—and not all are waterbirds. Migrating songbirds come there as well. 08 of 10 Virginia Hisham Ibrahim/Getty Images Length: 3,315 mi (5,335 km)Bordering: The Atlantic Ocean The first permanent English settlement in North America was in Jamestown, Virginia, which is nearby present-day Williamsburg. 09 of 10 Michigan Danita Delimont/Getty Images Length: 3,224 mi (5,189 km)Bordering: Lake Michigan, Lake Huron, Lake Superior, and Lake Erie Michigan might not have ocean coastline, but having borders on four Great Lakes sure gives it a lot of shorelines, enough to make this top 10 list, anyway. It has the longest freshwater coastline in the United States. 10 of 10 Maryland Greg Pease/Getty Images Length: 3,190 mi (5,130 km)Bordering: The Atlantic Ocean Sea levels are rising around Maryland's Chesapeake Bay, with some of the issues due to climate change. At the same time, the land along the coast is sinking, making the difference over time all the more dramatic.