On October 1, 1922, the name Tolt changed to Carnation. The town was renamed for Carnation Dairy, a world famous dairy farm started in 1910. The new name was controversial: Tolt had been the traditional Indian name. (The town had been the main village site for the Snoqualmies for thousands of years). In subsequent years the name reverted to Tolt, and then back to Carnation.
The original location of the post office was on the east side of Lake Washington, about two miles south of the future location of Carnation on the east bank of Snoqualmie River.