Union 05 Käl Téiteng or Union 05 Football Club Kayl-Tétange is a football club, based in the commune of Kayl, in south-western Luxembourg.

Union 05 play their home games at the Stade Victor Marchal.

The club was formed in 2005 after a merger between FC Kayl 07 and SC Tétange.

SC Tétange won the 1951 Luxembourg Cup.

[1] In 2009 the club was promoted to the second tier-Luxembourg Division of Honour and in 2011 they became champions and were promoted for the first time to the Luxembourg National Division, the highest level of Luxembourg football.