Firle is generally considered an average suburb compared to other suburbs in Adelaide. Crime rates are below the Greater Adelaide average, with Assault being the most commonly reported violent crime, and Theft the most commonly reported property crime. From 2023 to 2024, Violent crime rates have decreased by 30.77%, and Property crime rates have decreased by 28%.

As with any area, it is recommended to stay aware of your surroundings and take the usual safety precautions.