Viktor Lonsmin (June 11, 1920 - July 22, 1990) was a Czechoslovak hockey player. He played for the Czechoslovak National Team at the 1939 World Championship. Lonsmin scored two goals in 10 games. He also competed at the 1940 International Week of Winter Sports. Lonsmin spent most of his club career with LTC Praha, but also played for SK Bratislava (1943-1946) and I. CLTK Praha (1946-1947). Lonsmin fled Czechoslovakia in 1947 after an arrest warrant for him was issued by the communist regime. Lonsmin lived the rest of his life in the United States and became an American citizen in 1956.