Were the states that were made in the Oregon Country Washington Oregon and California?

The states formed from the Oregon Country are primarily Oregon and Washington. California was not part of the Oregon Country; it was part of the territory acquired through the Treaty of Guadalupe Hidalgo in 1848, following the Mexican-American War. The Oregon Country, which included present-day Oregon, Washington, and parts of Idaho and Montana, was jointly occupied by the U.S. and Britain until the Oregon Treaty of 1846 established the U.S. claim.