The listing below identifies 25 Maryland high schools that send the most students to the Clark School.

In alphabetical order, the schools are:

• Aberdeen High School
• Atholton High School
• Beth Tfiloh Dahan Community High School
• James Hubert Blake High School
• Broadneck Senior High School
• Calvert Hall College High School
• Centennial High School
• Winston Churchill High School
• Dulaney High School
• Walter Johnson High School
• Loyola Blakefield High School
• Colonel Zadok Magruder High School
• Montgomery Blair High School
• Richard Montgomery High School
• Mount Hebron High School
• Mount Saint Joseph High School
• Old Mill Senior High School
• Paint Branch High School
• Eleanor Roosevelt High School
• Sherwood High School
• Springbrook High School
• Towson High School
• Tuscarora High School
• Urbana High School
• Walt Whitman High School
• Thomas Sprigg Wootton High School

*Note that, owing to ties, there are 26 schools listed.