Spyridon "Spiros" Bitsakis (Greek: Σπυρίδων Μπιτσάκης; born March 4, 1981) is a Greek former swimmer, who specialized in freestyle events. He is a two-time Olympian (2000 and 2004), and a 2003 All-American swimmer in the 100 m freestyle, while studying in the United States. He is one of two Greek swimmers, alongside Apostolos Tsagkarakis, who trained for the Alabama Crimson Tide, under head coach Don Gambril, at the University of Alabama in Tuscaloosa.