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For the 2025-26 school year, there are 5 public high schools serving 739 students in Lake County, SD.

The top ranked public high schools in Lake County, SD are Chester High School - 01, Chester Area Cyber School - 92 and High Plains - 06. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.

Lake County, SD public high schools have an average math proficiency score of 44% (versus the South Dakota public high school average of 40%), and reading proficiency score of 60% (versus the 63% statewide average). High schools in Lake County have an average ranking of 6/10, which is in the top 50% of South Dakota public high schools.

Lake County, SD public high school have a Graduation Rate of 66%, which is less than the South Dakota average of 82%.

The school with highest graduation rate is Madison High School - 01, with 85-89% graduation rate. Read more about public school graduation rate statistics in South Dakota or national school graduation rate statistics.

Minority enrollment is 10% of the student body (majority Hispanic), which is less than the South Dakota public high school average of 35% (majority American Indian).