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

In alphabetical order, the schools are:

• Atholton High School
• Archbishop Spalding High School
• Broadneck Senior High School
• Calvert Hall College High School
• Centennial High School
• Colonel Zadok Magruder High School
• Dulaney High School
• Eleanor Roosevelt High School
• Franklin High School
• Glenelg High School
• Howard High School
• James Hubert Blake High School
• Loyola Blakefield High School
• Marriotts Ridge High School
• Middletown High School
• Montgomery Blair High School
• Mount Hebron High School
• Northwest High School
• Notre Dame Preparatory School
• Poolesville High School
• Quince Orchard High School
• Richard Montgomery High School
• River Hill High School
• Severna Park Senior High School
• Sherwood High School
• Thomas Sprigg Wootton High School
• Urbana High School
• Walt Whitman High School
• Walter Johnson High School
• Winston Churchill High School

*Note that, owing to ties, there are 30 schools listed.