Sofia Walbaum (born 18 May 1989) is a Chilean field hockey player. Walbaum has represented Chile at both junior and senior levels. She made her junior debut at the 2005 Pan-Am Junior Championship, and her senior debut one year later in 2006. Her first major tournament was the 2006 South American Games. Walbaum was instrumental in Chile's success at the 2017 Pan American Cup, scoring 2 goals in her team's campaign. The team ultimately lost to Argentina 4–1 in the final.