| Nguyễn Hoàng Helio | |
| Full Name: | Helio da Silva Assis |
| Birth Date: | 26 January 1981 |
| Birth Place: | Brazil |
| Height: | 1.87 m |
| Position: | Defender |
| Clubs1: | Sociedade Esportiva Matsubara |
| Years2: | 2005 |
| Clubs2: | SHB Da Nang |
| Years3: | 2006–2007 |
| Clubs3: | Ho Chi Minh City FC |
| Years4: | 2008 |
| Clubs4: | Haiphong FC |
| Years5: | 2009 |
| Clubs5: | Becamex Binh Duong |
| Goals5: | 4 |
| Years6: | 2010–2011 |
| Clubs6: | Song Lam Nghe An FC |
| Caps6: | 22 |
| Goals6: | 9 |
| Years7: | 2012–2013 |
| Clubs7: | Becamex Binh Duong |
| Caps7: | 46 |
| Goals7: | 1 |
| Years8: | 2014 |
| Clubs8: | LPBank Hoang Anh Gia Lai FC |
| Caps8: | 19 |
| Goals8: | 3 |
Helio da Silva Assis (born 26 January 1981) is a Brazilian former footballer who played for Vietnamese side Song Lam Nghe An FC, helping the club win the league.[1] He mainly operated as a central midfielder who "recover[ed] the ball relatively well", though his "ability to launch attacks" was "weak".[2]
He is a naturalized Vietnamese citizen.[3]