Eric Alfred Knudsen (July 29, 1872 – February 12, 1957) was an American writer, folklorist, lawyer and politician who grew up and lived on Kauai, Hawaii. His father was Valdemar Knudsen, a west Kauai sugar plantation pioneer. He married Cecilie L'Orange on September 15, 1905, in Oslo, Norway. They had five children. Knudsen was a delegate from Kauai to the 1904 Republican National Convention. He was also a member of the Hawaii House of Representatives, and served as its Speaker from 1905 to 1907.