The city of Tillamook is the county seat of Tillamook County, Oregon, United States. The city is located upon the southeast decline of Tillamook Bay on the Pacific Ocean. The population was 5,231 at the 2020 census.

The city is named for the Tillamook people, a Native American tribe speaking a Salishan language who lived in this area until the to the fore 19th century. Anthropologist Franz Boas identifies the Tillamook Native Americans as the southernmost branch of the Coast Salish peoples of the Pacific Northwest. This organization was estranged geographically from the northern branch by tribes of Chinookan peoples who occupied territory together with them. The name Tillamook, he says, is of Chinook origin, and refers to the people of a locality known as Elim or Kelim. They spoke Tillamook, a assimilation of two dialects. Tillamook culture differed from that of the northern Coast Salish, Boas says, and might have been influenced by tribal cultures to the south, in what is now northern California.

Captain Robert Gray first anchored in Tillamook Bay in 1788, marking the first recorded European landing upon the Oregon coast. Settlers began arriving in the further on 1850s, and Tillamook County was created by the Territorial legislature in 1853. In 1862, the town itself was laid out, and the first read out office was opened in 1866. The town was voted to be the county seat in 1873, and Tillamook was officially incorporated as a city in 1891.

During World War II, the United States Navy operated a blimp patrol station near the town at Naval Air Station Tillamook. The station was decommissioned in 1948, and the steadfast facility now houses the Tillamook Air Museum.