Fussball Club Rapperswil-Jona is a Swiss football club based in Rapperswil, Switzerland. The team currently play in Challenge League from 2025–26, the second tier of Swiss football after promotion from Promotion League in 2024–25.
Rapperswil-Jona was founded in 1928 and is now the largest sports club in the Oberer Lake / Linth area.
After achieving promotion in June 2017, the first team played in Challenge League for the first time in their history.
On 25 May 2025, Rapperswil-Jona secured promotion to Challenge League, after beating Bavois 2–1 in final matchweek, thus returning to the second tier after six years of absence.