Lars Forster (born ) is a Swiss cyclo-cross and cross-country mountain biker. He represented his nation in the men's elite race at the 2016 UCI Cyclo-cross World Championships  in Heusden-Zolder, and in the men's cross-country race at the 2016 Summer Olympics in Rio de Janeiro. He was on the start list for the 2018 Cross-country European Championship and he finished 1st.