A survey showed young men have the biggest egos behind the wheel, with 86.6% believing they are better than others despite being some of the least experienced on the road.
The AA, which carried out the poll, warned people who over-estimate their driving abilities can take excessive risks.
Conor Faughnan, AA Director of Policy said: “It is this cavalier attitude to risk that is at the core of Ireland’s road safety problem.”
Five people have been killed on Irish roads since Friday, despite a 9% drop in fatalities up to the end of June.
Mr Faughnan continued: “While there are many excellent drivers out there, the findings of our survey do suggest that most of us are more than a little biased when it comes to our own driving.
“None of us are perfect and most of us have unwittingly picked up bad and sometimes even dangerous habits that we are not aware of.”
The AA Motor Insurance poll of 15,000 drivers found:
– 69% rated their own driving as above average, while only 0.8% described their driving as below par.
– 86.8% of men aged 17 to 24 described themselves as above average drivers. Of these, 44.9% rated themselves as well above average, compared to 18.2% of women in the same age.