The 1990 FIFA World Cup was the 14th FIFA World Cup, a quadrennial football tournament for men's senior national teams. It was held from 8 June to 8 July 1990 in Italy, the second country to host the event for a second time (the first being Mexico in 1986). Teams representing 116 national football associations entered and qualification began in April 1988. 22 teams qualified from this process, along with the host nation Italy and defending champions Argentina.

The tournament was won by West Germany, for the third time. They beat defending champions Argentina 1–0 at the Stadio Olimpico in Rome, a rematch of the previous final four years earlier. Italy finished third and England fourth, after both lost their semi-finals in penalty shootouts. This was the last tournament to feature a team from West Germany, with the country being reunified with East Germany a few months later in October, as well as teams from the Eastern Bloc before the end of the Cold War in 1991, as the Soviet Union and Czechoslovakia teams made their final appearances. Costa Rica, Ireland and the United Arab Emirates made their first appearances in the finals. As of 2022, this was the only time the United Arab Emirates qualified for a FIFA World Cup finals. Cameroon went on an unexpectedly strong run in the tournament, becoming the first African team to reach the quarter-finals of the World Cup. The official match ball was the Adidas Etrusco Unico.

The 1990 World Cup is widely regarded as one of the poorest World Cups in terms of the games. It generated an average 2.21 goals per game – a record low that still stands – and a then-record 16 red cards, including the first dismissal in a final. The tournament also had a significant lasting influence on the game as a whole. In England, the team's success in this tournament led to the resurgence of the domestic top-flight, which had suffered from violence on the pitch and hooliganism by spectators throughout the 1980s. It saw the introduction of the pre-match Fair Play Flag (then inscribed with \"Fair Play Please\") to encourage fair play. Overly defensive tactics of many teams led to the introduction of the back-pass rule in 1992 and three points for a win instead of two, both of which have encouraged attacking play, increasing spectator interest in the sport. The tournament also produced some of the World Cup's best remembered moments and stories, including the emergence of African nations, in addition to what has become the World Cup soundtrack: \"Nessun dorma\".

The 1990 World Cup stands as one of the most watched events in television history, garnering an estimated 26.69 billion non-unique viewers over the course of the tournament. This was the first World Cup to be officially recorded and transmitted in HDTV by the Italian broadcaster RAI in association with Japan's NHK. The huge success of the broadcasting model has also had a lasting impact on the sport. At the time it was the most watched World Cup in history in non-unique viewers, but was bettered by the 1994 and 2002 World Cups.