Anders Lennart Kjellberg (30 September 1857, Uppsala – 7 May 1936, Uppsala) was a Swedish classical archaeologist. He was the son of psychiatrist Gustaf Kjellberg (1827–1893). From 1877 he studied at Uppsala University, earning his doctorate in 1889. In 1896 he became an associate professor of classical archaeology at Uppsala. He received the title of professor in 1913, and five years later became a full professor of classical archaeology.