Jan Piecko (b. February 3rd 1955 in Katowice, Poland) is a former Polish left winger.
Piecko began his career with his home club, Baildon Katowice. From 1974 to 1976 inclusively, Piecko was Polish vice-champion with Katowice. In 1981, Piecko moved to Polonia Bytom. He spent his most successful moments in Poland with two other vice-champion titles (1983 and 1985), one Polish championship (1984) and, for that year, the title of best goal scorer. His career in Poland saw him take part in 460 games; he scored 367 times in total, good enough for the sixth best all-time performance in the league's history.
Piecko joined EV Ravensburg in Germany's in 1989 after emigrating to the country. His loyalty and self-sacrifice for the team, as well as his skills, earned him to have his number 22 retired by the Upper Swabian team in 2001.
Piecko played over 100 games for the Polish National Team from 1973 to 1985, scoring 45 times. During than span, he played in six World Championships, as well as in the 1984 Olympics in Sarajevo.