- Senior club appearances and points correct as of 18 October 2015. †Appearances (Points).
Armandt Koster (born (1990-01-20)20 January 1990 in Vryheid, South Africa) is a South African rugby union player, currently playing with the Free State Cheetahs. His regular position is flanker or lock.
He was included in the Free State U21 squad for the 2011 Under-21 Provincial Championship, but didn't make any appearances for them. In 2012, he was included in the UFS Shimlas squad for the 2012 Varsity Cup. He played seven times for Shimlas, scoring tries in their matches against TUT Vikings and NWU Pukke. He returned to make two substitute appearances during the 2013 Varsity Cup and started in five matches for Shimlas during the 2014 Varsity Cup.