They are being purchased with a FEMA Fire Prevention And Safety grant worth more than $124,000.
Two hundred of the new detectors are specially designed for people who are deaf or hearing impaired.
"Last year 27 people lost their lives to fires in Chicago. This year we're at 23. The lower trending is in contract to the days of triple digit death counts in the early 70s before widespread use of smoke detectors was mandated by law,"
All of the newly purchased smoke detectors have a 10-year tamper-resistant lithium battery.
The Chicago Fire Department and ABC7 are working together on Operation Save-A-Life, where you can get tips on ways you can keep your family safe from a fire.