Edgar Valter Saks (January 25, 1910 Tartu – April 11, 1984, Montreal) was an Estonian amateur historian and author.
His book The Estonian Vikings: a Treatise on Finno-Ugric Viking Activities describes the ancient history of Estonians and other Finnic peoples living on the shores of the Baltic Sea.
His etymological works provide information about hypothetical extensive prehistoric Estonian settlement in Northern Europe.
Warsaw and Sumer), Saks reasoned there must have been extensive prehistoric Finnic influence not only in Europe, but also in neighbouring regions.
Linguist Urmas Sutrop has referred to him as "fantasiser and author of pseudoscientific history books".