Peter H. Clark Montessori Junior High and High School, usually referred to as Clark Montessori, is a junior and senior high school in Cincinnati, Ohio, United States.

It is in the Hyde Park–area woods, on the former estate of Ohio Governor Myers Y. Cooper (1929–1931), with trails in its "backyard".

[3] Clark is a part of the Cincinnati Public Schools.

Founded in 1994 as a seventh-grade extension of existing district Montessori elementary schools, Clark expanded with its first class to become a full junior and senior high school by the 1999–2000 school year.

The school has been given a rating of "effective" by Cincinnati Public Schools and was in the top three school selected in Barack Obama's 2010 Race to the Top.