MLHS is owned and operated by forty-six Lutheran Church–Missouri Synod (LCMS) congregations, the Lutheran High School Association of Greater Milwaukee (LHSAGM), and accredited by the North Central Association of Colleges and Schools.

[6] The Missouri Synod congregations opened MLHS in September 1955,[7] marking the end of the joint operation of the school.

Twenty-seven Missouri Synod congregations formed "The Lutheran High School Association of Greater Milwaukee" on January 23, 1952.

By May 1956, the music rooms and the gymnasium with its swimming pool had been completed, and the formal dedication occurred during the senior graduation ceremonies on May 6.

3–28) is a reprint of the article of the same name published in two parts in Concordia Historical Institute Quarterly, 33 (4), January 1961, and 34 (1), April 1961.