How long is the U.S. shoreline?
NOAA’s official value for the total length of the U.S. shoreline is 95,471 miles. “The NOAA shoreline length calculation of 95,471 miles was determined by hand in 1939-40 with a recording instrument on the largest-scale charts and maps available at that time. Shorelines of outer coast, offshore islands, sounds, bays, rivers, and creeks were included …