More than 3,300 people were detected using mobile phones behind the wheel last year - an average of nine a day.
Men were the worst offenders, with 2,791 breaking the law compared to 551 women, according to PSNI motoring offences statistics.
Those aged 30-49 accounted for over half of mobile phone detections (1,749), followed by the 50-69 age bracket (759), while 748 caught were in the 18-29 group.
PSNI Inspector Rosie Leech expressed concern at the figures.
She said: "We know that motorists who choose to use their mobile phone while driving are four times more likely to crash, injure or kill themselves or other people.