Darwin Gabriel Núñez Ribeiro (Spanish pronunciation: [ˈdaɾwin ˈnuɲeθ]; born 24 June 1999) is a Uruguayan professional footballer who plays as a forward for Saudi Pro League club Al-Hilal and the Uruguay national team.

Núñez came through Peñarol's youth academy, being promoted to the first team in 2017. In August 2019, he joined Spanish Segunda División club Almería for a club record fee. Benfica signed him in 2020 for a club-record transfer worth €24 million, the most expensive signing in Portuguese football history. In his second season, he won the Bola de Prata for top scorer in the Primeira Liga with 26 goals in 28 games, being named in the Primeira Liga Team of the Year and Primeira Liga Player of the Year. Liverpool then signed him in 2022 for a transfer worth €75 million (£64 million). After winning the 2024–25 Premier League, he was sold to Al-Hilal for €53 million (£46 million).

After representing Uruguay at various youth levels, Núñez was called up to the senior national team for his first time in 2019. He scored on his international debut against Peru. After missing the 2021 Copa América due to an injury, Núñez represented Uruguay at the 2022 FIFA World Cup and the 2024 Copa América.

Darwin Gabriel Núñez Ribeiro was born on 24 June 1999 in Artigas, Artigas Department. He was born into an impoverished family, in which his father Bibiano Núñez was a builder and his mother Silvia Ribeiro was a hawker of milk bottles. Núñez played for local clubs La Luz and San Miguel before being scouted at the age of 14 by former Uruguay international José Perdomo, and then moving by himself to the capital city Montevideo to join the ranks of Peñarol.

Struggling with homesickness, Núñez returned to his hometown to spend time with his family and went back to Peñarol a year later. At the age of 17, he suffered a cruciate ligament injury that ruled him out for over a year and required two operations. While he was injured, his older brother Junior quit the club and gave up football to provide for the family, telling him "you're better suited than me".

He made his first-team debut in the Primera División on 22 November 2017, when he came on for Peñarol as a second-half substitute for Maxi Rodríguez in a 2–1 away loss against River Plate Montevideo. The following month, he had knee surgery for a second time. Núñez scored his first professional goal on 13 October 2018, with the opener in a 2–0 home win over Fénix. On 14 July 2019, he scored a hat-trick in a 4–0 victory against Boston River.

On 29 August 2019, Spanish Segunda División club Almería announced the signing of Núñez on a five-year contract, for a rumoured club record fee of US$4.5 million plus $1.5 million in variables. He made his debut on 3 October as a half-time substitute in 4–2 league defeat against Sporting Gijón. On 27 October 2019, starting for the first time, Núñez scored first goal for his new club in a 3–2 home win against Extremadura with a penalty. He finished his only season at the Estadio de los Juegos Mediterráneos as the league's joint fourth top scorer with 16 goals, led by compatriot Cristhian Stuani. Núñez scored these 16 goals in twice as many appearances.

On 4 September 2020, Núñez signed a five-year contract with Portuguese club Benfica, who paid a club record fee of €24 million for the player. This was also Almeria's and the Segunda División's biggest transfer, with the club also receiving 20% of a future transfer.