Listed are the known High Schools in Cavalier County. Information later than 1930 is known for several of the high schools listed, but it was decided to only list graduates from 1930 and older. Starting in the 1960's many of these original county schools were closed or consolidated with others. Today, only Munich and Langdon still have high schools.

Alsen High School-----Help, need information, contact County Coordinator-----

Calvin High School-----Help, need information, contact County Coordinator-----

Langdon High School
Opened in 1899 with the first graduating class in 1903.

Milton High School
The first graduating class was in 1914.

Osnabrock Township Consolidated School-----Help, need information, contact County Coordinator-----
School District formed in 1919 which offered two years of High School until 1946.

Osnabrock High School
Opened 1916 with first graduating class in 1918.

St. Alphonsus High School, Langdon
A two year high school opened in 1920 and became a four year high school in 1928. The first graduating class was in 1930.