Longford is the most expensive county in Ireland for car insurance, with motorists there forking out an average of €783 on a policy.
Longford and Louth are the only counties where comprehensive insurance premiums top €700, while drivers in Limerick, Cavan and Offaly also face some of the heftiest bills in the country.
The research, by Chill Insurance, found that bills in Waterford are the lowest, at €549, with premiums in Kilkenny, Wicklow, Wexford and Cork also among the most affordable.