Karasuyama, Tochigi

 was a town located in Nasu District, Tochigi Prefecture, Japan.
As of 2003, the town had an estimated population of 18,799 and a density of 202.44 persons per km². The total area was 92.86 km².
On October 1, 2005, Karasuyama, along with the town of Minaminasu (also from Nasu District), was merged to create the city of Nasukarasuyama and no longer exists as an independent municipality.