Janne Petteri Ahonen (Finnish pronunciation: [ˈjɑnːɛ ˈpɛʈːɛrɪ ˈɑhonɛn] pronunciation ; born 11 May 1977) is a Finnish ski jumper and drag racer. He is one of the most successful ski jumpers of all time, as well as one of the most successful from Finland, having won two consecutive World Cup titles; the Four Hills Tournament a record five times; two individual gold medals at the World Championships; and the Nordic Tournament once.

Ahonen's most notable achievements include five World Championships (normal hill in 1997; large hill in 2005; team large hill in 1995, 1997 and 2003), two World Cup overall titles (2003/04 and 2004/05) and a record-breaking five victories in the Four Hills Tournament (1998/99, 2002/03, 2004/05, 2005/06 and 2007/08). He is the all-time leader in World Cup points, podiums (133) and top 10 appearances (245). With 36 World Cup victories, Ahonen has the fourth-most behind Gregor Schlierenzauer, Matti Nykänen and Adam Małysz. In 2005, Ahonen was named the Finnish Sports Personality of the Year.