K. Nanthakumar
| Personal information | |||
|---|---|---|---|
| Full name | Nanthakumar a/l Kaliappan | ||
| Date of birth | 13 October 1977 | ||
| Place of birth | Perak, Malaysia | ||
| Height | 1.82 m (6 ft 0 in) | ||
| Position(s) | Defensive Midfielder, Centre Back | ||
| Team information | |||
Current team  | Negeri Sembilan (head coach) | ||
| Youth career | |||
| 1998 | Perak President's Cup Team | ||
| Senior career* | |||
| Years | Team | Apps | (Gls) | 
| 1998–2004 | Perak FA | 89 | (5) | 
| 2005 | MPPJ FC | 7 | (0) | 
| 2006–2008 | Perak FA | 41 | (2) | 
| 2008–2010 | Selangor FA | 22 | (2) | 
| 2010–2012 | Perak FA | 31 | (1) | 
| 2013 | Kelantan FA | 7 | (0) | 
| 2014 | Negeri Sembilan FA | 17 | (0) | 
| 2015–2017 | MISC-MIFA | ?? | (1) | 
| International career‡ | |||
| 2002–2010 | Malaysia | 36 | (0) | 
| Managerial career | |||
| 2024–2025 | Negeri Sembilan | ||
| 
*Club domestic league appearances and goals, correct as of 28 January 2018 ‡ National team caps and goals, correct as of 5 December 2013  | |||
Nanthakumar Kaliappan (born 13 October 1977) or better known as K. Nanthakumar is a former Malaysian footballer where he played as a defensive midfielder. He was a member of the Malaysian national team from 2002 until 2010. Nanthakumar is a former head coach of Malaysia Super League club Negeri Sembilan.