Aleksy Antkiewicz (November 12, 1923 – April 3, 2005) was a Polish boxer. He won two Olympic medals for Poland: bronze in London 1948 in featherweight division (which was the only Polish medal at those Olympic Games and the first medal for Poland in boxing) and silver at the next Olympics in Helsinki 1952 in lightweight.
He was born in Katlewo, Warmia and died in Gdańsk. Antkiewicz was named the Polish Sportspersonality of the Year in 1948.
1948 (as a featherweight)
- Defeated Leon Trani (Philippines) PTS
- Defeated Pedro Garcia (Peru) PTS
- Defeated Seo Byeong-Ran (South Korea) PTS
- Lost to Ernesto Formenti (Italy) PTS (semifinal)
- Defeated Francisco Nunez (Argentina) PTS (bronze medal match)
1952 (as a lightweight)