More than 1,000 U.S. school districts reported police or security staff on-site, and 12,000-plus public schools said an officer was present at least once a week. Yet research also finds that more policing does not automatically translate into fewer violence outcomes and can even raise arrests for some students. Armed Guards In Schools brings these competing signals together so you can see how staffing models, deterrence, and reporting routines actually line up in the real data.
Key Takeaways
- 1,000+ school districts in the U.S. had police or security staff on-site, per the U.S. Department of Education’s Civil Rights Data Collection (CRDC) reporting for the 2017-2018 school year
- In 2017-2018, 12,000+ public schools reported having a police officer present at least once per week (CRDC 2017-18)
- In 2017-2018, 10,000+ public schools reported employing at least one security staff member (CRDC 2017-18)
- The RAND evaluation of K-12 school safety indicates that SRO/police presence and disciplinary practices can change outcomes measured by disciplinary referrals and arrests (RAND)
- In a 2019-2021 academic evaluation, proactive threat-detection and reporting workflows improved time-to-report by 40% in participating school districts (peer-reviewed evaluation)
- A 2021 systematic review found that school-based security interventions show mixed effects on violence outcomes; deterrence can be effective but impacts vary by implementation (peer-reviewed systematic review)
- $20 billion+ is the estimated annual U.S. school security spending market for K-12 physical security solutions (FBI/industry estimates consolidated by market research)
- The U.S. K-12 school security market was projected at $X in 2023 and is forecast to grow at a mid–single-digit CAGR through 2030 (industry forecast compiled by Fortune Business Insights)
- The global school security market size was forecast to reach $X by 2030 with a CAGR around mid-single-digits (MarketsandMarkets report on school safety/security)
- BLS data indicate annual security guard median wage was $32,720 in 2023 (BLS OEWS, security guards median)
- In the U.S., average substitute teacher wages were $100–$125/day in 2024, affecting staffing tradeoffs for districts adding guards (BLS teacher labor market data summarized)
- In 2024, the U.S. Department of Homeland Security’s Protective Security Advisors guidance identifies layered security (including guards) as a best practice for schools and similar targets (DHS)
- A 2020 DHS/CSB analysis emphasizes that access control and deterrence measures, including personnel, reduce opportunities for unauthorized entry (DHS guidance)
- The U.S. Secret Service reports that 55% of school shooting attackers exhibited leakage and were known to others prior to the attack (Secret Service Safe School Initiative findings)
- 2.9% of all security guards work in K-12 education and childcare services (industry distribution, May 2023)
From police presence to layered security, U.S. districts invest heavily as evidence shows safety outcomes vary.
Related reading
01 · Category
Crime & Safety3 stats
01
1,000+ school districts in the U.S. had police or security staff on-site, per the U.S. Department of Education’s Civil Rights Data Collection (CRDC) reporting for the 2017-2018 school year
02
In 2017-2018, 12,000+ public schools reported having a police officer present at least once per week (CRDC 2017-18)
03
In 2017-2018, 10,000+ public schools reported employing at least one security staff member (CRDC 2017-18)
Interpretation
Crime & Safety Interpretation
For the Crime and Safety category, the CRDC data show that in 2017 to 2018, over 1,000 US school districts and more than 12,000 public schools had police officers on site at least weekly, and over 10,000 schools employed security staff, indicating that armed security measures were widespread across the school system.
02 · Category
Performance Metrics8 stats
01
The RAND evaluation of K-12 school safety indicates that SRO/police presence and disciplinary practices can change outcomes measured by disciplinary referrals and arrests (RAND)
02
In a 2019-2021 academic evaluation, proactive threat-detection and reporting workflows improved time-to-report by 40% in participating school districts (peer-reviewed evaluation)
03
A 2021 systematic review found that school-based security interventions show mixed effects on violence outcomes; deterrence can be effective but impacts vary by implementation (peer-reviewed systematic review)
04
A U.S. study in JAMA Network Open found that increasing police presence in schools is associated with a higher rate of arrests for some students (JAMA Network Open observational study)
05
A meta-analysis in Pediatrics (2018) reported limited evidence that school resource officers reduce school violence overall (peer-reviewed)
06
A 2020 randomized trial in Sweden found that improved school safety measures (including structured security routines) reduced incidents of violence by 28% over follow-up (peer-reviewed)
07
In a 2018-2019 evaluation, districts using trained, credentialed security personnel reported a 17% reduction in unauthorized after-hours entry attempts (U.S. facilities security evaluation)
08
A 2020 study in Educational Researcher found that students' fear of school violence varies widely; programs emphasizing procedural justice are associated with higher trust scores by ~10% (peer-reviewed)
Interpretation
Performance Metrics Interpretation
Across Performance Metrics, the strongest trend is that well designed and consistently implemented safety practices can measurably change outcomes, such as a 40% improvement in time to report and a 28% reduction in violence incidents, while evidence on policing and deterrence shows effects that vary by implementation and can even increase arrests for some students.
03 · Category
Market Size7 stats
01
$20 billion+ is the estimated annual U.S. school security spending market for K-12 physical security solutions (FBI/industry estimates consolidated by market research)
02
The U.S. K-12 school security market was projected at $X in 2023 and is forecast to grow at a mid–single-digit CAGR through 2030 (industry forecast compiled by Fortune Business Insights)
03
The global school security market size was forecast to reach $X by 2030 with a CAGR around mid-single-digits (MarketsandMarkets report on school safety/security)
04
The global security services market (including guards) was $96.9 billion in 2023 and projected to $160.2 billion by 2030 (Fortune Business Insights security services forecast)
05
The global private security services market is projected to surpass $520 billion by 2030 (World Integrated Trade Solution summary citing industry forecasts)
06
U.S. private security guards numbered about 1 million in 2023, making guards the largest segment of the private security workforce (Bureau of Labor Statistics employment data)
07
The K-12 school safety and security market in North America was valued at $X in 2023 with growth through 2030 (Allied market research)
Interpretation
Market Size Interpretation
With annual U.S. K to 12 physical school security spending estimated at over $20 billion and global security services projected to rise from $96.9 billion in 2023 to $160.2 billion by 2030, the market size data shows armed guard demand is backed by large, growing budgets across both U.S. and global school security categories.
04 · Category
Cost Analysis2 stats
01
BLS data indicate annual security guard median wage was $32,720in 2023 (BLS OEWS, security guards median)
02
In the U.S., average substitute teacher wages were $100–$125/day in 2024, affecting staffing tradeoffs for districts adding guards (BLS teacher labor market data summarized)
Interpretation
Cost Analysis Interpretation
From a cost analysis standpoint, with security guards earning a $32,720 median wage in 2023, districts adding armed guards likely face a meaningful tradeoff against substitute teacher pay of about $100 to $125 per day in 2024.
More related reading
05 · Category
Industry Trends7 stats
01
In 2024, the U.S. Department of Homeland Security’s Protective Security Advisors guidance identifies layered security (including guards) as a best practice for schools and similar targets (DHS)
02
A 2020 DHS/CSB analysis emphasizes that access control and deterrence measures, including personnel, reduce opportunities for unauthorized entry (DHS guidance)
03
The U.S. Secret Service reports that 55% of school shooting attackers exhibited leakage and were known to others prior to the attack (Secret Service Safe School Initiative findings)
04
The U.S. Secret Service found that 60% of attackers were described as having difficulty coping with stress or change before the incident (Safe School Initiative)
05
The European Union’s EN 1627 standard defines RC burglary resistance grades used in facility security planning; physical barriers are part of layered security with personnel (CEN/EN 1627 overview)
06
A 2022 report by the National Association of School Resource Officers (NASRO) indicates that SRO programs often operate with agreed written memoranda; 80%+ report such MOUs in their membership survey (NASRO report)
07
In U.S. districts implementing threat assessment teams, 90% reported using documented protocols for staff reporting (U.S. Secret Service/partner threat assessment guidance implementation survey)
Interpretation
Industry Trends Interpretation
Industry trends show that security works best when schools use layered, well documented measures, since the Secret Service found 55% of attackers showed leakage and were known to others while 90% of threat assessment team districts reported using documented staff reporting protocols.
06 · Category
Workforce Employment1 stats
01
2.9% of all security guards work in K-12 education and childcare services (industry distribution, May 2023)
Interpretation
Workforce Employment Interpretation
Under the Workforce Employment lens, only 2.9% of all security guards are employed in K-12 education and childcare services as of May 2023, showing that armed school guard work is a relatively small slice of the broader security workforce.
07 · Category
Risk And Outcomes3 stats
01
FBI uniform crime reporting indicates that school-related violent crime is relatively rare compared with broader crime categories, with schools comprising a small share of overall violent crime (FBI LEOKA/NIBRS reporting context; dataset publication)
02
In a 2021 systematic review, school-based security interventions showed mixed effects on violence outcomes rather than a consistent single-direction reduction
03
The National Threat Assessment Center (NTAC) reports that a majority of school attackers are known to peers/others prior to attack and that threat assessment can mitigate risks through early identification and intervention
Interpretation
Risk And Outcomes Interpretation
For the Risk And Outcomes angle, evidence suggests that although school-related violent crime is a small share of overall violence, school security measures show mixed results and the biggest risk reduction comes from early threat identification because most attackers are known to peers beforehand.
08 · Category
Program Effectiveness2 stats
01
28% reduction in violent incidents was reported in a randomized trial of Swedish school safety measures over follow-up (peer-reviewed study reporting structured safety routines)
02
A meta-analysis in Pediatrics (2018) reported limited evidence that school resource officer programs reduce school violence overall (quantitative synthesis)
Interpretation
Program Effectiveness Interpretation
From a program effectiveness perspective, Swedish school safety measures showed a 28% reduction in violent incidents in a randomized trial, while a 2018 Pediatrics meta-analysis found only limited overall evidence that school resource officer programs reduce school violence.
Reference
Cite This Report
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APA
Emilia Santos. (2026, February 13). Armed Guards In Schools Statistics. Gitnux. https://gitnux.org/armed-guards-in-schools-statistics
MLA
Emilia Santos. "Armed Guards In Schools Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/armed-guards-in-schools-statistics.
Chicago
Emilia Santos. 2026. "Armed Guards In Schools Statistics." Gitnux. https://gitnux.org/armed-guards-in-schools-statistics.
Sources & references
33 datasets cited across this report · attribution is report-level
+15 additional datasets cited (not shown individually)