Ignacy Tloczynski (Polish pronunciation: [ig'nats? tw?'t??j~sk?i]; 14 July 1911 – 25 December 2000) was a Polish tennis player, coach and World War II veteran.
Tloczynski participated in 10 Davis Cup ties for Poland from 1930–1939, posting a 23–8 record in singles and a 3–9 record in doubles.
He won two national titles in singles, seven in doubles and was a six-time International Polish Championship winner.
He was ranked number one in Poland in 1934.In international level he reached the third round at Wimbledon on four occasions.
He was a doubles semi-finalist for the French Open with Adam Baworowski, won the Monte-Carlo tournament (now known as the Monte-Carlo Masters) in doubles with Józef Hebda, a two-times singles runner-up for the British Hard Court Championships, and three-times Scottish champion.