New figures show that the Dublin region had the highest average disposable income per person in 2011.
The Central Statistics Office said that at a total of €21,329 disposable income in Dublin was almost 12% higher that the overall State figure of €19,055.
Of the seven other regions - the South West, South East, Mid West, Mid East, West, Midland and Border - only the Mid East had an average disposable income per person higher than the State total.
Today's figures show that the Border region - with an average disposable income of €16,984 - and the Midland region, with €17,428, were 10.9% and 8.5% lower than the State average.
They also show that Dublin, Kildare, Limerick and Cork are the only counties where per capita disposable income exceeded the State average in 2011. Meanwhile the counties of Donegal and Kerry had per capital disposable incomes below 85 and 90% in the years from 2002 to 2011.
The CSO said that the gap between the maximum and minimum value of disposable income per person per region rose from €2,896 in 2010 to €4,345 in 2011. Dublin incomes rose by €632 while those of the lowest region fell by €817.