Mona von Bismarck (ne Strader; February 5, 1897 - July 10, 1983), also known as Mona Bismarck, was an American socialite, fashion icon and philanthropist. Her five husbands included Harrison Williams, among the richest men in America, and Count Albrecht Edzard von Bismarck-Schnhausen, a grandson of German Chancellor Otto von Bismarck. She was the first American to be named "The Best Dressed Woman in the World" by a panel of top couturiers, including Coco Chanel, and she was also named to the International Best Dressed List Hall of Fame.