The 1986 Giro d'Italia of cycling, the 69th edition of the race, was held from 12 May to 2 June 1986. It covered a total of 3,858 km at an average speed of 37.615 km/h, in 22 stages. It was won by the Italian Roberto Visentini.

The Giro d'Italia (Italian pronunciation: [ˈdʒiːro diˈtaːlja]; English: Tour of Italy), also simply known as The Giro, is a long-distance road bicycle racing stage race for professional cyclists held over three weeks in May/early June in and around Italy. The Giro is one of the three Grand Tours (the others being the Tour de France and the Vuelta a España), and is part of the UCI World Ranking calendar. It is the second most prominent stage race in the world (after the Tour), and along with the Tour and the Road World Cycling Championship it makes up the Triple Crown of Cycling.

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The origin of the Giro d'Italia is similar to that of the Tour de France. It began because of a competition between two newspapers, La Gazzetta dello Sport and Corriere della Sera. La Gazzetta dello Sport wished to boost its circulation by holding a professional road race, like the Tour de France. Corriere della Sera wanted to increase its circulation by holding an organized car rally. On 7 August 1908 the newspaper's founder Eugenio Camillo Costamagna, director Armando Cougnet, and its editor Tullio Morgagni announced the inaugural Giro d'Italia to be held in 1909. Corriere della Sera offered a winners bonus of 3,000 lire.