Government departments are spending €7.7 million on energy bills a year, nearly double the amount they were paying in 2002.
The increase is higher than the rise in the cost of energy in the same period.
According to figures provided in Dáil questions, Government departments saw their electricity, oil and gas bills rise by an average 90 per cent between 2002 and 2006.
This compares with a price increase of 35 per cent for electricity and 80 per cent for gas in the same period. The cost of heating oil nearly doubled in the same period, although it accounts for only a fraction of energy costs in most departments.
Just one department claimed to have reduced its energy use during the period, although almost every response contained commitments to doing so.
However, Fine Gael Dublin South Central TD Gay Mitchell, who tabled the questions, said the figures showed that the Government and Civil Service had failed to show leadership on the issue.
"The figures show that nothing has happened since 2002. I do not think any sort of leadership has been shown by Government in this area."
The single biggest energy user in Government is the Department of Agriculture, which accounted for half of the Government energy bill. The department has offices in 28 locations, in addition to its main offices in Dublin, Cavan and Portlaoise.
The figures equate to a spend of between €300 to €600 for every civil servant working in department offices.
The Department of the Environment was unable to provide its energy costs, but said energy use at its headquarters in the Custom House had decreased by 3 per cent between 2002 and 2006.
With the exception of two, every other department was unable to provide a breakdown on the amount of energy used.
The Department of Health showed that its use of electricity had more than doubled to 2.2 million kilowatt hours between 2002 and 2006. Gas consumption had risen by 10 per cent to 1.2 million kilowatt hours, while its heating oil use had jumped from 6,900 litres a year to 36,600 a year.
The Department of Education showed a rise of 10 per cent for electricity and 20 per cent for gas, which was accounted for mainly by the opening of 10 regional offices in 2003.
Many other departments blamed the increases on the opening of extra offices. This includes the Department of Communications and Natural Resources which is responsible for promoting energy conservation. Its energy bill rose from €313,000 in 2003 to €574,000 in 2006.
The department is responsible for the Power of One campaign, which is encouraging the public to be more energy conscious and includes a programme targeting the public service.
In their responses almost every department referred to initiatives aimed at introducing increased energy efficiency.
The measures, including a ban on traditional light bulbs and the introduction of renewable energy sources in some buildings, were announced this month by Minister for Natural Resources Noel Dempsey.