Falun is a census-designated place (CDP) in southwestern Saline County, Kansas, United States.

Falun was founded by the Swedish immigrant Erik Fors (or Eric Forsse as he called himself in America).

Some of the Falun residents came directly from Sweden, while others arrived after having lived in Bishop Hill and Galva, Illinois.

[6] In 1886, the Union Pacific Railroad put rails through the township and established a station; the railway was essential for the town's continued development.

[5] In the following year the residents of Falun decided that their numbers had grown sufficiently for them to establish a church.

The 2020 United States census counted 83 people, 45 households, and 39 families in Falun.