Luigi Ganna (1 December 1883 – 2 October 1957) was an Italian professional road racing cyclist. He was the overall winner of the first Giro d'Italia, held in 1909, as well as the first Italian winner of the classic Milan–San Remo earlier that year. Further highlights in his career were his fifth place in the 1908 Tour de France and several podium places in Italian classic races. In 1908 he set a new Italian hour record, which he held for six years.
He was born in Induno Olona, near Varese, in Lombardy. Before becoming a professional cyclist, he worked as a bricklayer, commuting up to 100 km to work by bike.