| Sérgio Júnior | |
| Fullname: | Sérgio Guimarães da Silva Júnior |
| Birth Date: | 1979 2, df=yes |
| Birth Place: | Rio de Janeiro, Brazil |
| Height: | 1.82 m |
| Position: | Forward |
| Years1: | 1999 |
| Clubs1: | Cruzeiro |
| Years2: | 2000–2001 |
| Clubs2: | Vitória S.C. |
| Caps2: | 24 |
| Goals2: | 4 |
| Clubs3: | Vizela |
| Caps3: | 11 |
| Goals3: | 3 |
| Years4: | 2002–2004 |
| Clubs4: | Sporting Cristal |
| Caps4: | 50 |
| Goals4: | 18 |
| Years5: | 2004 |
| Clubs5: | Ittihad Jeddah |
| Years6: | 2005 |
| Clubs6: | Ponte Preta |
| Caps6: | 22 |
| Goals6: | 3 |
| Years7: | 2005 |
| Clubs7: | Bucheon FC 1995 |
| Years8: | 2006 |
| Clubs8: | Portuguesa |
| Caps8: | 3 |
| Goals8: | 0 |
| Years9: | 2007 |
| Clubs9: | Beijing Renhe |
| Years10: | 2008 |
| Clubs10: | Rio Claro |
| Years11: | 2008 |
| Clubs11: | Marília |
| Caps11: | 1 |
| Goals11: | 0 |
| Years12: | 2008 |
| Clubs12: | Sport Boys |
| Caps12: | 17 |
| Goals12: | 5 |
| Years13: | 2009 |
| Clubs13: | Cienciano |
| Caps13: | 29 |
| Goals13: | 8 |
| Years14: | 2010 |
| Clubs14: | Santa Helena |
| Years15: | 2011 |
| Clubs15: | Fluminense |
| Caps15: | 11 |
| Goals15: | 1 |
| Years16: | 2012 |
| Clubs16: | Bangu |
| Years17: | 2012–2013 |
| Clubs17: | América de Natal |
| Caps17: | 1 |
| Goals17: | 0 |
| Years18: | 2013 |
| Clubs18: | Bangu |
| Years19: | 2013 |
| Clubs19: | Macaé |
| Years20: | 2014 |
| Clubs20: | Nova Iguaçu |
| Years21: | 2014 |
| Clubs21: | Icasa |
| Years22: | 2014 |
| Clubs22: | Al Hilal Club |
| Years23: | 2015 |
| Clubs23: | Madureira |
| Caps23: | 2 |
| Goals23: | 0 |
Sérgio Guimarães da Silva Júnior (born 19 February 1979), commonly known as Sérgio Júnior, is a Brazilian former professional footballer who played as a forward.
Sérgio Júnior has played club football for several Brazilian clubs throughout his career. He has also spent several seasons playing in the Peruvian first division, winning the 2003 Apertura championship with Sporting Cristal. He had also had spells playing in China, Portugal, South Korea, Saudi Arabia.