Enner Remberto Valencia Lastra (born 4 November 1989) is an Ecuadorian professional footballer who plays as a forward for Liga MX club Pachuca and captains the Ecuador national team.

Valencia previously played for Emelec in Ecuador, where he won the 2013 Ecuadorian Serie A and was awarded the Copa Sudamericana Golden Boot in 2013. He also played for Pachuca in Mexico, being awarded the Liga MX Golden Boot in the 2014 Clausura tournament. He joined English club West Ham United for an estimated £12 million in July 2014, almost breaking the club's signing record. In August 2016, Valencia went out on loan to Everton for the season, before being sold to Mexican club Tigres UANL in July 2017. At Tigres, he won Liga MX's 2017 Apertura and 2019 Clausura tournaments, and finished runner-up in the 2019 CONCACAF Champions League, winning the latter competition's Golden Boot. In August 2020, Valencia signed for Fenerbahçe in Turkey and won the Turkish Cup in his final season, before joining Brazilian club Internacional in mid-2023.

At the international level, Valencia has earned over 100 caps for Ecuador since his debut in 2012. He represented the nation at the FIFA World Cup in 2014 and 2022, and the Copa América in 2015, 2016, 2019, 2021 and 2024. Widely regarded as one of the best Ecuadorian players of all time, Valencia is Ecuador's all-time top scorer with 48 goals, and has also scored a record six World Cup goals for his national team.

Enner Valencia came to Guayaquil to trial for Emelec in 2008 from Caribe Junior's youth system, the same team where Ecuador star Antonio Valencia played in his early years. In 2008, he was transferred to Emelec. From 2008 to early 2010 he received no opportunities in the first team, but with the arrival of the Argentinian coach Jorge Sampaoli, Valencia started to receive playtime opportunities. Emelec were runners-up to champions L.D.U. Quito, losing 2–1 on aggregate score.

Valencia scored nine league goals in 30 league matches in 2011. In November 2012, he scored five goals in five separate matches against El Nacional, LDU Loja, Técnico Universitario, and twice against Manta in both home and away matches, winning four of the five matches, only drawing against LDU Loja. This brought his goal tally to 13 goals scored in 40 league matches played, his best season yet, but for a third season in a row, the team was runner-up to league champions and club rivals Barcelona SC.

On 7 August 2013, Valencia scored his first career hat-trick against Peruvian side Sport Huancayo, in a 4–0 2013 Copa Sudamericana first round match. He finished the season as league champions with Emelec, the club's first since 2002.

After numerous rumours involving the interest of Liga MX side Pachuca for Valencia, both parties came to terms and agreed on a transfer.

On 18 January 2014, Valencia scored his first goal in a 2–1 victory against Tijuana. The following week he scored two goals to in Pachuca's first away win league match against league champions Club León. He finished the regular season as the top goal-scorer with 12 goals, scoring various braces for Pachuca. Valencia scored his first hat-trick against UNAM in a 2–4 away win to advance in the 2014 Liga MX Clausura play-offs.