One incident of drink driving was recorded in the midlands.
16 people were arrested on suspicion of driving under the influence of drink or drugs on Christmas Day.
This is up from last year, when 11 people were arrested.
One incident of drink driving was recorded in Westmeath yesterday.
Gardai say it marks a huge increase and is a worrying trend.
Since the launch of their Christmas road safety campaign, Gardai have arrested more than 650 drivers on suspicion of intoxicated driving.