Ireland Data Centre Electricity Use Reached 23 Percent In 2025

Ireland’s data centres used 23 percent of the country’s metered electricity in 2025, according to Central Statistics Office figures cited by The Register, even though most new grid connections around Dublin were still effectively restricted for most of the year.

The CSO figures listed data centre consumption at 7,663 gigawatt hours in 2025, up from 6,973 gigawatt hours in 2024.

The CSO dataset also listed the sector’s share at 20 percent in 2023, 14 percent in 2021 and 5 percent in 2015.

The reported 2025 share moved data centres above urban households, which accounted for 18 percent of metered electricity use, and above rural households, which accounted for 9 percent.

The Register quoted CSO Climate and Energy Division statistician Grzegorz Głaczyński as saying datacenter consumption had grown every year without exception, more than doubling between 2015 and 2019 and tripling again between 2019 and 2025.

Dublin Grid Restrictions Did Not Stop A 2025 Load Increase

Ireland’s Commission for Regulation of Utilities restricted most new server-farm grid connections in the Dublin area, where much of the country’s data centre activity is concentrated.

The report said the restriction was lifted in December 2025.

By then, the load increase had already kept data centre demand above the previous year’s level.

The report said stricter connection rules now require server-farm operators seeking grid connections of more than 10 MW to provide generators or battery systems capable of matching the requested power.

Those operators are also required to feed power back to the national grid when required, a model the report said Microsoft and Digital Realty had already pioneered.

Under those rules, backup generation and storage became part of the grid-connection test, not only a resilience feature for operators.

The figures cited by The Register place Ireland’s datacenter policy at the junction of electricity demand, grid stability and server-farm capacity.

Public Opposition Grows Around Ireland's Data Centre Load

Ireland has seen protests against data centres as electricity use has climbed.

The report said the country is understood to have more than 80 data centres for a population of just over 5 million people, a scale that has made server-farm expansion a public electricity issue rather than only a technology-sector planning question.

The report also compared Ireland’s pressure with U.S. public opposition to new data centre estates, saying the Trump administration has asked technology companies to commit that new facilities will not raise energy bills or drain local water supplies.

The U.S. comparison came from The Register’s report, while the Ireland load figures come from CSO electricity-consumption data.

The CSO figures did not identify individual operators’ facility-level electricity demand, pending connection requests, project-by-project battery capacity, or the power contribution each data centre could return to the Irish grid.