Alexandru Koller (born 20 April 1953) is a Romanian former footballer turned businessman. A defender, he played for Unirea ZalÃÂu, ASA Târgu Mureà  and FC Baia Mare. He made five appearances for the Romania national team.
Koller was born in Cehu Silvaniei, SÃÂlaj, Romania.
He scored a goal from a penalty kick in the 1981âÂÂ82 Cupa României final, which FC Baia Mare lost with 3âÂÂ2 against Dinamo BucureÃÂti.
On 27 September 1982, Koller scored at Santiago Bernabéu, opening the score for FC Baia Mare in a European Cup Winners' Cup second leg match against Real Madrid. At that time, the Romanian team was playing in Divizia B, the second division. Eventually, Real Madrid won by 5 goals to 2.
Koller won five caps for Romania in 1976 against Iran, in 1978 against Poland, in 1979 against East Germany, Poland and USSR.
He retired from football in 1983, aged only 30, to become vice-president of FC Baia Mare and then between 1990 and 1996 he was president and owner of the club.
ÃÂkos Koller, his nephew, played for Videoton FC Fehérvár and Hungary being one of the best centre backs of the Hungarian first league championship.
FC Baia Mare