Falun is a census-designated place in southwestern Saline County, Kansas, United States. As of the 2020 census, the population was 83. It lies southwest of Salina and northwest of Lindsborg at the intersection of Forsse and Hedberg roads, approximately 7.5 miles west of Interstate 135, or about eight miles west of Assaria. It lies next to an abandoned railr…Falun is a census-designated place in southwestern Saline County, Kansas, United States. As of the 2020 census, the population was 83. It lies southwest of Salina and northwest of Lindsborg at the intersection of Forsse and Hedberg roads, approximately 7.5 miles west of Interstate 135, or about eight miles west of Assaria. It lies next to an abandoned railroad.