Karl Langer (1903–1969) was an Austrian-born architect in Queensland, Australia. A number of his works are listed on the Queensland Heritage Register.

St Peters Lutheran College Chapel is a heritage-listed chapel on the campus of St Peters Lutheran College in Indooroopilly, Brisbane, Australia. It was designed by Karl Langer and built in 1968 by W. W. Groom. It was added to the Queensland Heritage Register on 7 December 2012.