Ernst Wilhelm Ludvig Karlberg (October 12, 1901 - March 20, 1987) was a Swedish ice hockey player. He was a member of the Swedish National Team at the 1924 and 1928 Olympic tournaments. Karlberg was also named to the 1923 European Championship, but was unable to participate as the Swedish Ice Hockey Association could not afford to pay his travel expenses to Antwerp. He spent his entire club career playing with the Swedish National Team.