Sebastian Krzysztof Świderski (born 26 June 1977) is a Polish former volleyball player and coach, member of the Poland men's national volleyball team in 1996–2011, participant of the Olympic Games (Athens 2004, Beijing 2008), silver medalist of the 2006 World Championship, three–time Polish Champion (2001, 2002, 2003), chairman of ZAKSA Kędzierzyn-Koźle since 2015.