- Kamila CuchilloPosition: midfielderBorn: 8 November 1999
- Karl FernándezPosition: midfielderBorn: 22 April 1987
- Karla CongaPosition: full-backBorn: 23 January 1994
- Karla LópezPosition: goalkeeperBorn: 16 September 1998
- Karlo CalcinaPosition: midfielderBorn: 3 March 1984
- Karol LebogangPosition: wing half, full-backBorn: 6 March 1997
- Katarina ComesañaPosition: forwardBorn: 19 June 1992
- Katia MarcelliNationality: ItalyBorn: 27 March 1969
- Katia SciontiNationality: ItalyBorn: 1975
- Kazuyoshi ShimabukuBorn: 29 July 1999Sport: association football
- Kelly MazzantePosition: shooting guardNationality: Italy, United States
- Kelvin Denis Sanchez VasquezPosition: midfielderBorn: 3 January 1999
- Kennedy ImadeNationality: ItalyBorn: 2 December 2005
- Kenny FlorianPosition: midfielderBorn: 26 May 1976
- Kerwin PeixotoPosition: defenderBorn: 21 February 1988
- Kevin BernardinelloNationality: Switzerland, Brazil, ItalyBorn: 5 September 2003
- Kevin BollaNationality: ItalyBorn: 30 May 1990
- Kevin FerreyraPosition: forwardBorn: 7 June 1999
- Kevin QuevedoPosition: attackerBorn: 22 February 1997
- Kevin RuízPosition: forwardBorn: 14 February 1995
- Kevin SandovalPosition: midfielderBorn: 3 May 1997
- Kike RodríguezPosition: centre-backBorn: 6 September 1991
- Kira BileckyPosition: defenderBorn: 12 April 1986
- Kluiverth AguilarPosition: full-backBorn: 5 May 2003
- Koichi AparicioPosition: centre-back, defenderBorn: 6 June 1992
- Kouaho David AnaneNationality: ItalyBorn: 20 December 2009
- Kurt Chanel KabundaNationality: ItalyBorn: 26 January 1989