|Date of birth||4 June 1940|
|Place of birth||Halle (Saale), Germany|
|1976–1982||1. FC Magdeburg|
|1994–1996||FSV Lok Altmark Stendal|
|* Senior club appearances and goals counted for the domestic league only|
Urbanczyk began his football career at Turbine Halle in 1948. Beginning in 1960, he played for this team – in the meantime renamed Chemie Halle and later Hallescher FC Chemie – in the DDR-Oberliga. His first Oberliga match was against Wismut Karl-Marx-Stadt on 20 March 1960, as a right midfielder. During his career, however, he made his home on the position of right defender. He appeared in 250 East German top flight matches (12 goals).
At the beginning of the 1960s, Urbanczyk was held to be one of the best right defenders in the world, on account of his speed and his slide-tackling skills. He played for East Germany between 1961 and 1969.
In a survey among managers of the magazine "Deutsches Sportecho", Urbanczyk was voted the best right defender of the 1962–63 season. At the Olympic Games in Tokyo in 1964, Urbanczyk's popularity rose further. He was one of the key figures of East Germany's team (representing the United Team of Germany) that reached the semi-final of the tournament. In the semi-final against the Czechoslovakia, Urbanczyk collided with his own goalkeeper Jürgen Heinsch and suffered a complicated knee injury, including torn cruciates. East Germany lost the semi-final, but won the bronze medal against Egypt. In the same year, Urbanczyk won the East German Sportsperson of the Year award – the only time that a footballer was given an individual award. Urbanczyk also won the East German Footballer of the Year award in 1964.
After ending his active career, Urbanczyk enjoyed success managing several Oberliga clubs, starting at HFC Chemie, then FC Rot-Weiß Erfurt. From 1976 to 1982 he was manager of 1. FC Magdeburg, winning the FDGB-Pokal in 1978 and 1979. His team was represented in the European competitions in every season, reaching the quarter-finals three times. After managing several other clubs, he returned to his home club in 1992, now called Hallescher FC, to manage them until 1994. Later, he enjoyed a small measure of success at FSV Lok Altmark Stendal who he guided to the DFB-Pokal quarter-final in 1995.
Klaus Urbanczyk is married and father of two daughters.
- Arnhold, Matthias (17 July 2012). "Klaus Urbanczyk – Matches and Goals in Oberliga". Rec.Sport.Soccer Statistics Foundation. Retrieved 18 July 2012.
- Arnhold, Matthias (17 July 2012). "Klaus Urbanczyk – International Appearances". Rec.Sport.Soccer Statistics Foundation. Retrieved 18 July 2012.
- Job, Bertram (28 April 2006). "Das späte Spiel". taz (in German). Retrieved 28 November 2008.