The Central Statistics Office says average weekly earnings in all areas of the public sector excluding the health service increased by 3.2% in the 12 months up to June of this year.
The figure includes overtime payments and does not take account of deductions like tax, PRSI and the pension levy introduced by the Government earlier this year.
The CSO says average weekly earnings in the civil service rose by 4.7% during the 12-month period, while earnings in the defence sector were up 4.3% and earnings in An Garda Siochana fell by 3.1%.
In the four years up to June 2009, average weekly earnings across the public sector (excluding health) increased by just over 16%.
Elsewhere, the CSO says total employment numbers in the public service fell by 2,700 between June 2008 and June 2009.