Ireland now has an estimated 33,000 millionaires, according to the latest Wealth of the Nation Report from Bank of Ireland.
The figure is up 10% over the past year.
Elsewhere, the report says Ireland's overall wealth grew by almost one-fifth to €805bn over the same period, with average wealth per head up to 196,000.
Bank of Ireland says this country is still the second-richest in the world behind Japan and ahead of the UK, US, France and Germany.