- Corona, CA
Serves this city
San Bernardino County · California
Security companies in Ontario, California
Ontario sits in San Bernardino County, California, with a 2020 census population of 175,265. 6 security companies in our directory record coverage for Ontario, and every one of them is a manually reviewed listing. Each card states whether the company is based in the city or serves it from nearby.
6 providers cover Ontario
Providers serving Ontario
Each card shows whether the company is based in Ontario, serves it from elsewhere, or covers all of California.
6 companies shown for Ontario.
- Los Angeles, CA
Serves this city
Highly trained professionals equipped with the best technology
- Los Angeles, CA
Serves this city
A new way to prevent theft
- Los Angeles, CA
Serves this city
All your security needs
- Thousand Palms, CA
Serves this city
The fastest and most reliable Way to order a security guard In California. Professional, reliable, and highly trained security guards at your service.
- Glendale, CA
Serves this city
Cities near Ontario
- Security companies in Chino5 mi
- Security companies in Rancho Cucamonga5 mi
- Security companies in Upland6 mi
- Security companies in Pomona8 mi
- Security companies in Chino Hills9 mi
- Security companies in Fontana10 mi
- Security companies in Diamond Bar12 mi
- Security companies in Corona13 mi
- Security companies in Rialto14 mi
- Security companies in Glendora14 mi
- Security companies in Riverside15 mi
- Security companies in Yorba Linda16 mi
Other San Bernardino County cities
Security services requested in Ontario
Unarmed Security Guards in Ontario
Uniformed guards for access control, patrol, and deterrence without firearms.
5 providers
Commercial & Business Security in Ontario
Guard coverage for offices, warehouses, and commercial property.
5 providers
Bank & Financial Security in Ontario
Guards trained for banks, credit unions, and cash-handling sites.
3 providers
Cannabis Dispensary Security in Ontario
Licensed guards for dispensaries and cannabis transport.
2 providers
K9 Security Services in Ontario
Handler and detection dog teams for patrol and screening.
3 providers
Maritime & Yacht Security in Ontario
Guards for marinas, vessels, and port-side property.
2 providers
Armed Security Guards in Ontario
Licensed armed officers for higher-risk sites and asset protection.
4 providers
Mobile Patrol Services in California
Marked vehicle patrols and alarm response across multiple sites.
Event Security in Ontario
Crowd management, access control, and safety staffing for events.
3 providers
Executive Protection in Ontario
Close protection and secure transport for individuals and teams.
3 providers
Construction Site Security in California
Theft and vandalism prevention for active job sites and equipment yards.
Gated Community Security in California
Access control, gate staffing, and patrols for HOAs and gated neighborhoods.
Lobby & Front Desk Security in California
Concierge-style officers for building lobbies and reception areas.
Parking Lot & Garage Security in California
Patrols and monitoring for parking lots and structures.
Vacant Property Security in California
Protection for vacant buildings, lots, and construction-adjacent sites.
Retail Loss Prevention in California
Uniformed and plain-clothes staff focused on shrink reduction.
Fire Watch in California
Compliance patrols when fire systems are impaired or under repair.
Alarm & Video Monitoring in California
Remote monitoring of intrusion alarms and camera systems.
Residential Security in Ontario
Gated community, HOA, and private residence security staffing.
5 providers
Hiring security in Ontario: common questions
- Do security guards in Ontario need a California licence?
- Yes. Guards working in Ontario must hold a California guard registration, and the companies employing them must hold a Private Patrol Operator licence from the Bureau of Security and Investigative Services. Ask for both numbers before you sign anything.
- How do I check a Ontario security company before hiring?
- Confirm the Private Patrol Operator number with BSIS, ask for a current certificate of insurance, and request references for sites of a similar size to yours.
- Which areas around Ontario do these companies cover?
- Coverage is stored per city. Most providers listed here also cover other San Bernardino County cities, and each card states whether the company is based in Ontario or travels in to serve it.
- What does Security Explorer publish about Ontario companies?
- We publish only listings that have passed manual review. We show a licence as checked only when we hold a dated record of that check, and featured placement is a paid position rather than a recommendation.
Need quotes from Ontario providers?
Tell us the site, service, and timing. We route your request only to companies whose stored coverage matches.
Request free quotes