Alarm companies
1,877 security and alarm companies. California alarm company operators and Illinois private alarm contractor agencies: companies licensed to sell, install, service and monitor alarm systems.
California
Livermore83San Diego45Sacramento42Fresno39Los Angeles36San Jose34Bakersfield22Anaheim21Riverside19San Francisco18Irvine18El Cajon14Simi Valley14Orange14Glendale13Huntington Beach13Van Nuys13Corona12Clovis12Concord11Costa Mesa11Chatsworth11Stockton11Roseville10Santa Rosa10Modesto10Rancho Cordova9Walnut Creek9Long Beach9Palm Desert9
Illinois
Chicago39Springfield18Naperville11Arlington Heights9Schaumburg9Mokena7Elgin7Downers Grove6Peoria6Rolling Meadows6East Peoria6Elmhurst6Calumet City5Northbrook5Lockport5Orland Park5Frankfort5Aurora4New Lenox4Bensenville4Alsip4Hoffman Estates4Tinley Park4Elk Grove Village4Lisle3Crystal Lake3McHenry3Addison3Wood Dale3Elburn3