Cottage Grove High School is a public high school located in Cottage Grove, Oregon, United States.

The new school building, opened in 2003, replacing the old high school building which had been built in 1939 and held its first classes in 1940. The school was originally located at 1000 Taylor Avenue.

In 2008, 92% of the school's seniors received a high school diploma. Of 195 students, 180 graduated, nine dropped out, three received a modified diploma, and three were still in high school the following year.