| Joseph Jadrejak | |
| Full Name: | Joseph Jadrzejczak |
| Birth Date: | 20 February 1918 |
| Birth Place: | Gladbeck, Germany |
| Death Place: | Saint-André-lez-Lille, France |
| Position: | Defender |
| Youthyears1: | 1930–1936 |
| Youthclubs1: | Houdain |
| Youthyears2: | 1936–1937 |
| Youthclubs2: | Divion |
| Youthyears3: | 1937–1939 |
| Youthclubs3: | Bruay |
| Years1: | 1939–1944 |
| Clubs1: | SC Fives |
| Years2: | 1944–1950 |
| Clubs2: | Lille |
| Nationalyears1: | 1947 |
| Nationalteam1: | France |
| Nationalcaps1: | 3 |
| Nationalgoals1: | 0 |
| Manageryears1: | 1969–1970 |
| Managerclubs1: | Lille |
Joseph Jadrzejczak, known as Joseph Jadrejak (20 February 1918 - 24 November 1990), was a football player and manager who played as a defender. He was part of the famed Lille team of the late 1940s. Born in Germany, he made three appearances for the France national team.
Born in Gladbeck, Westphalia, Germany, Jadrejak moved to France with his family when he was two years old.
In the 1969–70 season, Jadrejak rejoined Lille as a manager, succeeding Daniel Langrand.
Jadrejak died in Saint-André-lez-Lille.
Lille
SC Fives