"At the end of the 2019–2020 school year, there were approximately 23,400 sworn school resource officers (SROs) in the United States (figure 1, table 1).1 About 11,500 (49%) of these SROs were employed by local police departments, 7,600 (32%) were employed by sheriffs’ offices, and 4,400 (19%) were employed by school district police departments."

Source

Davis, Elizabeth J. School Resource Officers, 2019-2020. US Dept. of Justice Bureau of Justice Statistics. NCJ307334. November 2023.