Han Tiauw Tjong Sia (1894–1940), known as Dr. Ir. Han Tiauw Tjong, was a prominent colonial Indonesian politician, engineer, community leader and a member of the influential Han family of Lasem. He sat in the Volksraad (the colonial legislature) of the Dutch East Indies for two terms (1924 – 1929, 1938 – 1939), and was a founding member of the centre-right political party Chung Hwa Hui. Han also served as a Trustee of the Technische Hoogeschool te Bandoeng (now ITB: the Institut Teknologi Bandung) from 1924 until 1940.