Milwaukee Lutheran Middle & High School is a school located in Milwaukee, in the U.S. state of Wisconsin. The school was originally known as Lutheran High School, established in 1903, making Milwaukee Lutheran one of the two oldest Lutheran high schools in the United States. In the 1950s, doctrinal differences between the two synods operating the school resulted in each forming its own school.

Milwaukee Lutheran is owned and operated by Lutheran Church – Missouri Synod (LCMS) congregations and the Lutheran High School Association of Greater Milwaukee (LHSAGM), and is accredited by the North Central Association of Colleges and Schools. Milwaukee Lutheran has twice been recognized as a National Exemplary School (Blue Ribbon School) by the U.S. Department of Education. In 1995, the LCMS honored Milwaukee Lutheran as a "Recognized School of Excellence".