| Lechosław Olsza | |
| Birth Date: | 28 February 1949 |
| Birth Place: | Sosnowiec, Poland |
| Youthclubs1: | Zryw Chorzów |
| Youthyears1: | -1966 |
| Position: | Midfielder |
| Years1: | 1966–1975 |
| Clubs1: | GKS Katowice |
| Caps1: | 250 |
| Goals1: | 6+ |
| Years2: | 1975–1977 |
| Clubs2: | GKS Tychy |
| Caps2: | 34 |
| Goals2: | 0 |
| Years3: | 1978–1979 |
| Clubs3: | GKS Katowice |
| Caps3: | 22 |
| Goals3: | 8 |
| Years4: | 1979–1980 |
| Clubs4: | Rozwój Katowice |
| Years5: | 1980–1982 |
| Clubs5: | SV St.Veit an der Glan |
| Goals5: | 1+ |
| Nationalteam1: | Poland U-23 |
| Nationalyears1: | 1971 |
| Nationalcaps1: | 1 |
| Nationalgoals1: | 0 |
| Nationalteam2: | Poland |
| Nationalyears2: | 1976 |
| Nationalcaps2: | 2 |
| Nationalgoals2: | 0 |
| Manageryears1: | 1984-1991 |
| Managerclubs1: | GKS Katowice (assistant manager) |
| Manageryears2: | 1996-2003 |
| Managerclubs2: | GKS Katowice (coach, director, misc.) |
| Manageryears3: | 2003 |
| Managerclubs3: | GKS Katowice (caretaker) |
| Manageryears4: | 2004 |
| Managerclubs4: | GKS Katowice |
| Manageryears5: | 2005 |
| Managerclubs5: | GKS Katowice |
Lechosław "Ola" Olsza (born 28 February 1949) is a Polish football manager and former player who played as a midfielder.[1] He is primarily associated with two Upper Silesian football clubs; GKS Katowice and GKS Tychy.
Olsza was brought to GKS Katowice from Zryw Chorzów by Jerzy Nikiel, debuting in a 1–0 win against Stal Rzeszów. In 1971 he was part of the squad that upset FC Barcelona at Camp Nou in 2–0 win. His greatest successes came with GKS Tychy however, winning the vice-championship in 1976, in what was the golden era for the club; this success earned him a call-up to the national team. In 1979 he spent a year with the then Third Division side Rozwój Katowice before emigrating to Austria for four years, playing alongside other Poles such as Józef Kwiatkowski and Józef Kurzeja.
Olsza played in the 1972 UEFA European Under-23 Championship in a Group 8 match, coming on a substitute against Albania in a 2–1 win on 12 May 1971. He played in two matches for the Poland senior national team in 1976,[2] making his debut against Greece.
In between various non-footballing activities and multiple emigrations from Poland, over the years he has had various roles at GKS Katowice, ranging from first team coach, second coach, assistant manager, manager, director of football, kit man, manual labourer, and stoker.
Olsza comes from a sporting family; his father Józef played for Ruch Chorzów, his uncle Kazimierz Pietranek for Stal Sosnowiec. Lechosław's daughter Aleksandra is a former Wimbledon Junior Girls title holder, his wife Barbara a 29-time national tennis champion, and his son a professional sports coach with a doctorate in sports science.