Nicolás "Niko" Hernández (born May 4, 1979 in Buenos Aires, Argentina) is an Argentine footballer. He currently plays for QNK Quảng Nam in the Vietnamese First Division.
Hernández began his professional career with the Primera División side Ferro Carril Oeste in 1999. After a year with them he moved to Colón de Santa Fe for a season. In 2002 he was signed by Italian club U.S. Cremonese. After a short spell with them he ended up back in Argentina playing for National B Division teams San Martín de Mendoza and Huracán until 2005 when he was picked up by Chilean powerhouse Cobreloa.
On March 30, 2006, he was signed by the Colorado Rapids. He started his first game with the club on April 2 against the Columbus Crew and scored 8 goals for the club. He was traded to the Columbus Crew on February 27, 2008 for Tim Ward. He was waived on June 27, 2008.
Niko moved to Costa Rica for play with the Liga Deportiva Alajuelense during one-year contract. He was the only non-Costa Rican on the roster.
He joined V-League side SHB Ðà Nẵng F.C. in 2010.
In 2012, Niko moved to Vietnamese First Division side QNK Quảng Nam.