Zawisza Bydgoszcz (Polish pronunciation: [zaˈviʂa bɨˈdɡɔʂt͡ʂ]) is a military-sponsored sports club from Bydgoszcz, Poland, founded in 1946. Its name commemorates a legendary Polish 15th-century knight, Zawisza Czarny (Zawisza the Black). The club holds many sections: football, track and field athletics, boxing, rowing, canoeing, weightlifting, gymnastics, shooting, and parachuting ones.
Zawisza's was founded in Koszalin, however a year later in 1947, being an army club, when the army offices moved to Bydgoszcz so was the team, however up until that point the team only played friendly matches. The football team has achieved some successes, playing for several years in the Polish First Division. For the first time, Zawisza won promotion in 1961. After relegation in the 1993/1994 season, the team had not managed to get back to the First Division till 2013. Zawisza's biggest achievement is reaching the semifinals of the Cup of Poland in 1991. Zawisza's youth teams have also won several medals during the national championships - gold (1981), silver (1958, 1986, 2013) and bronze (1967, 1979). Zawisza was relegated from Second Level to Fourth Level in the 1997-98 season and promoted to Third Level after finishing 1st Kujawsko-Pomorsko-Wielkopolska (Kujavia-Pomerania and Great Poland) Group of 3rd liga in the 2007-2008 season. On 12 June 2011, after a 13 year absence, Zawisza was promoted to the Second Level (Pierwsza Liga) after finishing second to Olimpia Grudziądz in the Druga Liga Zachodnia (West group of two Third Level divisions) in the 2010-11 season. In 2013 Zawisza got promoted to the Ekstraklasa (after 19 years of playing in lower leagues), which is the First Level of Polish leagues. Finally Zawisza won Polish Cup in 2013-14 season and qualified to UEFA Europe League second qualifying round. They also competed in 1993 Intertoto Cup.
Zawisza Bydgoszcz SA was a club that was created when Kujawiak Włocławek were moved to Bydgoszcz and renamed by Hydrobudowa, their owners. The original Zawisza Bydgoszcz continued playing in the fourth division, however the new club had a very similar logo and an identical name. As a result Kujawiak, Zawisza and supporters all over the country boycotted the relocated team. The reserve team continued to play under the name Kujawiak Włocławek in the Fourth Polish league. The club folded in 2007 as a result of serious corruption allegations and widespread condemnation.