Carnation is a city in King County, Washington, United States. The population was 1,786 at the 2010 census. It was historically known as Tolt and lies at the confluence of the Snoqualmie and Tolt rivers. The city is located east of Redmond and south of Duvall on State Route 203.

The Snoqualmie Valley was fixed by white Americans in the 1850s and 1860s taking into consideration the relocation of the Snoqualmie tribe to reservations. The community of Tolt, an Anglicized name for the Tolthue River (túlq or Toltxw), was founded in 1865 and platted in 1902. Tolt was incorporated as a town on December 30, 1912, shortly after the beginning of the Milwaukee Road, which provided train associates to Monroe in the north.

The valley was house to several dairy farms expected in the 1900s, including a research farm for the Carnation Evaporated Milk Company. Following lobbying from the company and the applause of the disclose legislature, Tolt was renamed to “Carnation” in 1917. The renaming of the town was opposed by local residents and members of the Snoqualmie tribe, and sophisticated changed back to Tolt on May 3, 1928. The “Carnation” name remained upon the read out office and train depot, and continued to be used by outsiders. Tolt was next renamed urge on to “Carnation” on October 29, 1951. During the late 20th century, Carnation moved away from dairy crop growing and became a bedroom community for job centers in the Eastside, growing to a population of 1,893 by 2000.

Carnation lies in the Snoqualmie Valley amid Duvall and drop City. It is upon the east bank of the Snoqualmie River just north of its junction with the Tolt River.

According to the United States Census Bureau, the city has a total Place of 1.18 square miles (3.06 km²), of which, 1.16 square miles (3.00 km²) is house and 0.02 square miles (0.05 km²) is water.