Donegal recorded the lowest median annual earnings nationally last year.
Figures published by the Central Statistics Office show that the average median annual earning in the county was just over €35,000.
€40,500 was the median annual earning in Sligo in 2023 while the figure in Leitrim was €39,000.
Those aged 40-49 were the highest earners in Sligo and Donegal while 30–39-year-olds earned the highest salaries in Leitrim.
Dublin had the highest median annual earnings last year, at €47,800, 11 per cent higher than the average across the state- €43,221.