Our Service Area In Missouri
Since 2010, Citywide Alarms have been a Missouri staple in home alarm systems, business alarm systems, security cameras, access control, and smart home automation in St. Louis & St. Charles County. Learn how we can help protect your home or business.
Trusted By Thousands
Home Security Systems For The St. Louis Metro Area
Citywide Alarms has protected homes and businesses across the St. Louis metro since 2010. As a family-owned company, we design, install, and monitor every system ourselves, so you're never stuck explaining your setup to someone unfamiliar with it. Ready to feel safer? Schedule your free estimate today.
A Local Leader In Home & Business Security
Home Alarms
A fully wireless home alarm system that catches intrusions the moment they happen and sends an instant signal to our 24/7 monitoring center.
Learn MoreSecurity Cameras
Professional security camera installation for St. Louis homes and businesses, with HD footage you can check from anywhere.
Learn MoreSmart Home Devices
Smart home automation that ties your video doorbell, locks, garage door, thermostat, and lights into one connected system.
Learn MoreBusiness Alarms
Commercial security systems built to protect your property, employees, and inventory, backed by business security system installation done right the first time.
Learn MoreAccess Control
Commercial access control systems that let you manage who enters your building and when, down to a single door.
Learn MoreCloud Storage
Secure cloud storage for your camera footage, so it's protected and easy to pull up even if the camera itself is damaged.
Learn MoreFire Alarm Systems
Code-compliant commercial fire alarm systems, monitored around the clock to alert responders the instant smoke or fire is detected.
Learn MoreMonitored Cameras
Live video monitoring that lets our team verify what's actually happening in real time, cutting down false alarms and speeding up real ones.
Learn MoreOur St. Louis Service Area
Clayton
Ladue
Kirkwood
Brentwood
Fenton
Creve Coeur
Webster Groves
Town & Country
Maryland Heights
Sunset Hills
Ballwin
Chesterfield
Ellisville
Arnold
Eureka
Florissant
Oakville
Des Peres
Overland
Rock Hill
Proud Partners Of Leading Home Alarm & Camera Companies
Our St. Charles County Service Area
O'Fallon
St. Paul
New Town
Wentzville
Foristell
Real Reviews From Real St. Louis & St. Charles Business Owners
Proudly Serving St. Charles and Beyond
Citywide Alarms provides trusted security solutions throughout St. Charles County and surrounding communities. Whether you’re a home or a business, we’re ready to help you protect what matters most.
- St. Charles965 Sycamore Dr.
St. Charles, MO 63304
Contact Us For A Quote
If we didn’t answer all of your questions, feel free to contact us at anytime.