| Isaac Nieves | |
| Fullname: | Isaac Nieves Rivera |
| Birth Date: | 6 January 1982 |
| Birth Place: | San Juan, Puerto Rico |
| Currentclub: | Bayamon FC |
| Position: | Midfielder |
| Years1: | 2004–2006 |
| Years2: | 2008–2009 |
| Years3: | 2010– |
| Clubs3: | Bayamon FC |
| Caps1: | 41 |
| Caps2: | 30 |
| Caps3: | 2 |
| Goals1: | 0 |
| Goals2: | 0 |
| Goals3: | 1 |
| Nationalyears1: | 2004– |
| Nationalteam1: | Puerto Rico |
| Nationalcaps1: | 5 |
| Nationalgoals1: | 1 |
| Pcupdate: | 9 July 2008 |
Isaac "Saito" Nieves (born January 6, 1981, in Puerto Rico) is a Puerto Rican soccer player who currently plays midfielder for Bayamon FC of the Puerto Rico Soccer League. Nieves played for the Puerto Rico national football team in a 2010 FIFA World Cup qualifying match.