Malahide households are in the money with average €78k-a-year
Families in Malahide have the highest average income in the State at €78,631 per household.
New figures from the Central Statistics Office (CSO) showed the median gross income for households stood at €45,256 in 2016.
The report, based on the 2016 census, looked at income county by county and by electoral division.
Incomes ranged from a low of €32,259 in Co Donegal and €41,824 in Co Limerick to highs including €66,203 in Dun Laoghaire-Rathdown.
In Fingal, households earned an average of €58,795; South County Dublin was at €52,759; and Dublin City at €47,294.
Malahide had the highest average income of €78,631 of all 41 towns in Ireland with a population of 10,000 or over.
In Co Kildare, Celbridge had the second highest at €64,877, while Maynooth was third at €64,529.
The towns with the lowest average incomes were Longford at €29,224, Enniscorthy at €31,049 and Ballina with €32,779.
The figures showed 42.3pc of households had two or more people earning an income, while 30.1pc had just one member earning a wage.
An average of 27pc of households across the country had no income earners at all.
Social welfare payments to people of working age made up more than half of the income in 13.7pc of households, while the State pension formed the majority of income in 12.9pc.
This gave a total of 26.6pc where social welfare made up more than half of household income.
Households where the occupants were in the medical, finance, legal and IT professions enjoyed the highest incomes, while farmers, care workers and home carers earned less than €30,000.
The data also showed a significant gender gap in some professions.
In the financial managers and directors' sector, the average salary for women was €60,126 and €94,500 for men.
In contrast, the primary and nursery teaching professions had the smallest gender gaps.
The CSO also revealed those who travel furthest to work also earn the most.
The average worker driving less than 30 minutes to work earns €32,004 a year, compared with €41,495 for those travelling more than 30 minutes.
The figures showed a link between earned income and general health. Those who described their health as "very bad" earned an average of €11,700, but those who earned more than €27,579 reported their health as "very good".
Senior statistician Kieran Culhane said the report's goal is to maximise the variety and volume of data available to provide high quality information to the Government, businesses and citizens.
"This information is required to allow the development of polices relating to affordable housing, provision of public health services and access to education," he said.
"Our aim is to ensure that citizens can live in an informed society while at the same time ensuring adherence to relevant data protection legislation.
"In using the increasingly varied sources of data available, the CSO must ensure that we continue to protect and secure data."