Fussballclub Thun 1898 is a Swiss football team from the Bernese Oberland town of Thun. The club plays in the Swiss Challenge League, the second tier of the Swiss football league system, following relegation from the Swiss Super League in the 2019–20 season. The club plays at the Stockhorn Arena which accommodates a total of 10,000 supporters, both seated and standing. The club's colours are red and white.

Thun is a town and a municipality in the administrative district of Thun in the canton of Bern in Switzerland. It is located where the Aare flows out of Lake Thun (Thunersee), 30 kilometres southeast of Bern.