Sonja Steinacher (born August 16, 1975 in Brixen) is a luger from Verdings/Klausen in South Tyrol who has competed for Italy since 1995. A natural track luger, she won five medals at the FIL World Luge Natural Track Championships with four medals in women's singles (Gold: 2001, 2003; Silver: 2000, Bronze: 1998) and a gold in the mixed team event (2003).