The K-12 School Shooting Database shows that California, at 215, has had the highest number of school shootings since 1970. Texas is second with 177 reported shootings, and Florida is third with 120. Conversely, Wyoming is both the least populous state and the state with the fewest school shootings.

There are a few notable exceptions to this trend. For example, New York is the fourth-most populous state but ranks eighth in school shootings, suggesting they have a lower rate of incidents than most states. On the other hand, Louisiana ranks fourteenth for school shootings, despite being the 25th largest state. When looking at shootings per capita, Lousiana ranks second. Washington D.C. has the highest incidence of school shootings per capita.

Source:

https://worldpopulationreview.com/state-rankings/school-shootings-by-state