New Trier
According to Wikipedia there has been 5 state championships
Safford high school.
Washington High School of Sioux Falls, South Dakota has 39 state championships, they won 14 straight from 1952 to 1965
Madison High School with 18
Seneca Valley high school with 12
The Pine Bluff High School Zebras have 21 State Championships in Football.
Euless Trinity High School, located in Euless, Texas, has won a total of seven state championships in football. Their championships were achieved in the years 1991, 1992, 1993, 1994, 1995, 1999, and 2000. The school is known for its strong football program and has a rich history of success in Texas high school athletics.
Highland Park Highschool in ILlinois
As of October 2023, the high school with the most girls' basketball state championships in Indiana is Bedford North Lawrence High School. They have won a total of 8 state titles, making them a dominant force in Indiana high school girls' basketball history. Their success in the sport has established a strong tradition and legacy within the community.
East Grand Rapids Pioneers
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The Missouri high school team with the most consecutive championships in football is the Marionville High School team. They achieved this remarkable feat by winning five consecutive state championships from 1998 to 2002. This achievement highlights their dominance in the sport during that period.