The country with the longest coastline in South America is Brazil. Stretching over 7,491 kilometers (4,655 miles), Brazil's coastline is dotted with stunning beaches, ports, and rich marine biodiversity. This extensive coastline plays a vital role in the national economy by supporting tourism, shipping, and fishing industries. Coastal regions in Brazil, including famous areas like Rio de Janeiro and Bahia, attract millions of tourists every year, contributing significantly to Brazil's cultural and economic landscape.