is an Argentine professional footballer who plays as a centre-back for Primeira Liga club Benfica, which he captains, and the Argentina national team.

Otamendi played for Vélez Sarsfield and Porto in his early career, winning eight major titles with Porto, including three Primeira Liga championships and the 2011 Europa League. He signed for Valencia in 2014 and spent four months on loan to Atlético Mineiro of Brazil. In 2015, he moved to Manchester City and won back-to-back Premier League titles in 2018 and 2019, as well as four League Cups and an FA Cup. In 2020, Otamendi returned to Portugal with Benfica, where he won another league title and the Portuguese League Cup.

An Argentina international since 2009, Otamendi has made over 120 appearances and represented his country at three FIFA World Cups and five Copas América. After consecutive runner-up finishes in the latter tournament, Otamendi won the 2021 Copa América on his fourth attempt, and would then lift the 2022 World Cup the following year, playing every single minute of Argentina's campaign. In 2024, Otamendi won a second consecutive Copa América title.