State border River Area (km2) Perlis-Kedah Perlis River 724.398 Penang-Kedah Perai River 447.824 Penang-Kedah Jawi River 231.031 Penang-Kedah-Perak Kerian River 1,420.233 Kedah-Penang Muda River 4,150.397 Perak-Selangor Bernam River 2,836.333 Selangor-Federal Territory Klang River 1,297.382 Selangor-Federal Territory Buloh River 451.926 Selangor-Federal Territory-Negeri Sembilan Langat River 2,347.882 Selangor-Negeri Sembilan Sepang River 101.932 Negeri Sembilan-Malacca Linggi River 1,297.668 Negeri Sembilan-Malacca Malacca River 614.575 Malacca-Johor-Negeri Sembilan Kesang River 658.263 Johor-Negeri Sembilan Muar River 6,137.800 Johor-Pahang Endau River 4,739.059 Pahang-Negeri Sembilan Pahang River 28,682.247