Nikolaos "Nikos" Pappas (Greek: Νικόλαος "Νίκος" Παππάς; born July 11, 1990) is a Greek professional basketball player for Panathinaikos of the Greek Basket League. He is 1.95 m (6 ft 4¾ in) tall.
Pappas began his career playing as a combo guard with the national team and in his early club career. After maturing as a player, he became a swingman, that plays both at the shooting guard and small forward positions. He is considered to be one of the best Greek swingmen.
Pappas made his professional debut in the Greek League with Panellinios, during the 2006–07 season. He made his debut in Europe's continent-wide second-tier level competition, the EuroCup, with Panellinios during the 2007–08 season. He signed a 5-year contract with the Spanish League club Bilbao Basket in 2008.
He was loaned to the farm club of Real Madrid, Real Madrid B, of the Spanish 4th Division, for the 2008–09 season. He was loaned to the Greek League club Kolossos Rodou for the 2009–10 and 2010–11 seasons. He was named the 2010 Greek League Best Young Player. In February 2012, he joined PAOK. He moved to Panionios for the 2012–13 season. With Panionios, he was the Greek League Top Scorer, and a member of the Greek League Best Five Team, in 2013.