Ithaca High School is a public high school located in Ithaca, Michigan, United States in central Gratiot County.

Serving grades 7-12, it is part of the Ithaca Public Schools system and a member of the Tri-Valley West Athletic Conference.

[2] Ithaca High School is accredited by the North Central Association.

[3] Advanced Placement courses are offered in physics, biology, statistics, U.S. and world history and English literature.

Additional AP courses are available online through Michigan Virtual High School[4] Ithaca is a member of the Tri-Valley West Athletic Conference, after leaving the Central State Activities Association prior to the 2006-07 school year.