Server farms gulped 23% of national power despite years of grid restrictions
Quarterly data center electricity consumption grew 584% from 291 GWh in Q1 2015 to 1,991 GWh in Q4 2026
Data centers accounted for 23% of Ireland’s total electricity consumption in 2025, according to data released by the country’s Central Statistics Office last week. The report revealed that data center consumption rose to 7,663 GWh in 2025 from 6,973 GWh in 2024, a 10% rise in a single year. Meanwhile, consumption by the rest of the country increased by just 2% within the same period.
Viewed over a ten-year period, the 2025 figure represents a steep 360% increase from 2015, when data centers’ total consumption was just 5%. The rise in consumption is even steeper when measured on a quarterly basis. Q4 2026’s consumption was 1,991 GWh, a 584% rise from Q1 2015’s 291 GWh.
“Newly compiled quarterly figures spanning 2015 to 2025 highlight a substantial increase in metered electricity consumption by data centers. Over this period, data center consumption saw a significant increase, from 291 GWh in the first quarter of 2015 to 1,991 GWh in Q4 2025, growing by 584%,” noted Dr. Grzegorz Głaczyński, an in-house statistician in the CSO’s Climate and Energy Division.
