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Great Plains Lutheran High School is focused on preparing students for lives of service to their communities and their Lord. In order to accomplish this, we provide a program of quality academics preparing students to enter college, tech school, or the workforce. Students learn in a safe, family-like environment in which teachers and students truly care for each other and demonstrate a high level of respect for one another.

Rev. David Maertz (1).jpg
David Maertz

Interim Principal,



GPLHS Statistics


  • Student enrollment = 135

  • Student/teacher ratio = 9:1

  • Instructors with advanced degrees = 35%

  • International student population = 5%

  • 1:1 chromebook mobile devices

  • Average class size = 15

  • GPL graduates enrolled in postsecondary education = 94%

  • Students involved in co-curricular activities = 97%

  • Average ACT score = 24 (ACT 5-year average composite score)

Location: Great Plains Lutheran High School is located in eastern South Dakota.  The city of Watertown has a population of 22,000.  Watertown is 100 miles north of Sioux Falls, South Dakota (population 150,000), 150 miles south of Fargo, North Dakota (population 150,000), and 200 miles west of Minneapolis/St. Paul, Minnesota (population 2.7 million).

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