| Stefan Adamczak | |
| Nationality: | Polish |
| Sport: | Athletics |
| Event: | Pole vault |
| Birth Date: | 27 November 1892 |
| Birth Place: | Mansfeld, Germany |
| Death Place: | Katowice, Poland |
| Height: | 1.75 m |
| Weight: | 73 kg |
Stefan Adamczak (27 November 1892 – September 1939) was a Polish pole vaulter and chorąży in the Polish Army.[1] He competed in the 1924 Summer Olympics.[2]
During World War I, he fought in the ranks of the Imperial German Army. Following Poland's restoration of independence in 1918, he joined Polish military forces. He fought in Polish-Soviet War and Polish-Ukrainian War. In September 1939, he took part in the defense of the city of Katowice during the German invasion of Poland, where he was most likely killed.[3]