The wave of break-ins took place in Carrigaline, Douglas, Lehenaghmore in Togher and Mount Oval in Rochestown.
Details of the 24 break-ins were revealed at the joint policing committee meeting in City Hall yesterday.
Chief Supt Barry McPolin said people were still not heeding warnings to lock their vehicles.
Of the 24 break-ins, 20 of the cars were left unlocked and, in one case, a woman’s handbag was visible inside the car when the thieves struck.
Crime prevention officer Sergeant Tony Davis said: “Everywhere people are leaving their cars open. Clearly, they are not listening. We had a big campaign around it and still it is happening.
“So until people are victims themselves, they don’t learn. It is very frustrating.”