Álvaro López San Martín (Spanish pronunciation: [ˈalβaɾo ˈlopeθ sam maɾˈtin]; born 2 June 1997 in Barcelona) is a Spanish tennis player.

López San Martín won the 2015 French Open boys' doubles championship, partnering Jaume Munar.

López San Martín has a career high ATP singles ranking of 349 achieved on 30 January 2017.