| Watcharapong Klahan | |
| Fullname: | Watcharapong Klahan |
| Birth Date: | 1978 8, df=yes |
| Birth Place: | Suphan Buri, Thailand |
| Position: | Goalkeeper |
| Youthclubs1: | Suphanburi |
| Years1: | 2000–2001 |
| Clubs1: | Suphanburi |
| Caps1: | 7 |
| Goals1: | 0 |
| Years2: | 2002–2005 |
| Clubs2: | TOT |
| Caps2: | 61 |
| Goals2: | 0 |
| Years3: | 2007 |
| Clubs3: | Bangkok Bank |
| Caps3: | 20 |
| Goals3: | 0 |
| Years4: | 2008–2010 |
| Clubs4: | Chula United |
| Caps4: | 39 |
| Goals4: | 0 |
| Years5: | 2010–2012 |
| Clubs5: | Sisaket |
| Caps5: | 42 |
| Goals5: | 0 |
| Years6: | 2012–2014 |
| Clubs6: | Army United |
| Caps6: | 14 |
| Goals6: | 0 |
| Years7: | 2015 |
| Caps7: | 4 |
| Goals7: | 0 |
| Nationalyears1: | 1996–1997 |
| Nationalteam1: | Thailand U17 |
| Manageryears1: | 2018 |
| Pcupdate: | 22 June 2008 |
Watcharapong Klahan (Thai วัชรพงศ์ กล้าหาญ) is a Thai former professional footballer and football coach.
Klahan played for Thailand at the 1997 FIFA U-17 World Championship in Egypt.