Oscar A.C. Lund (born May 21, 1885 in Stockholm, Sweden – died there in 1963) was an important silent film actor, screenwriter, and director of the American motion picture industry.

Sometimes recorded by his initials O.A.C. Lund, at the beginning of the 20th century he migrated to the United States to join the burgeoning motion-picture industry, directing his first film in 1912 titled "The Wager." The following year, Lund filmed "The Great Unknown" in Canada, marking it as the first dramatic film ever to be made in that country.

As was often the case in the early days of film, Lund also wrote the screenplay as well as acted in many of the films he directed. In 1917 he wrote what might be labeled as a docudrama called "Mother Love and the Law." The film was based on a real life child-custody case in Illinois.

Between 1912 to 1924 Oscar Lund directed more than 60 films in the United States including the first feature film made by the New Jersey-based Eclair Company in 1914 titled "Into the Wilderness." He frequently worked with the British actress Barbara Tennant , directing her in more than half a dozen films.

In 1933, in his native Sweden, Lund returned to filmmaking, directing his first talkie, a Swedish language film titled "Kärlek och dynamit" (Love and Dynamite).

Oscar Lund died in 1963 and was interred in the Skogskyrkogården in Stockholm.