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Data Centers Drove Half of All U.S. Electricity Demand Growth in 2025 — and the IEA Says That Won't Change Through 2030
NATIONAL
Energy & Grid
April 20, 2026
Source: IEA, Fortune, Bloomberg
The International Energy Agency reported that data centers accounted for roughly half of all electricity demand growth in the United States in 2025 — far surpassing the rise in residential, industrial, and transportation sectors combined. U.S. energy demand grew 2% last year, the second-highest rate since 2000 excluding post-recession rebounds, and the single largest contributor was AI data center construction.
The global numbers are equally stark. Electricity demand from all data centers surged 17% in 2025. AI-focused data centers specifically saw demand soar 50%. The IEA projects data center electricity consumption will double globally by 2030, with AI-focused facilities tripling. The pipeline of conditional offtake agreements between data center operators and small modular reactor nuclear projects has grown from 25 gigawatts at the end of 2024 to 45 gigawatts today — a measure of how seriously the industry takes the supply gap.
The IEA expects data centers to continue accounting for half of U.S. electricity demand growth through 2030. That means the demand pressure Illinois warned about — where one customer class could require more electricity than all existing customers combined — isn't a future risk. It's already the dominant force reshaping the American grid.
What You Can Do
Ask your utility for data center load projections. The IEA data confirms data centers are the single largest driver of U.S. electricity demand growth. If a data center is proposed in your service territory, request your utility's load forecast and ask how much of the projected growth comes from data centers versus residential and commercial customers.
Cite this data in rate case testimony. If your utility is seeking a rate increase to fund grid expansion, the IEA's finding that data centers drive half of demand growth is powerful evidence that large-load customers — not residential ratepayers — should bear the infrastructure costs. Reference this in public comments or testimony before your state PUC.
Push for load forecast accountability. Pennsylvania's load forecast accountability law gives regulators authority to scrutinize utility demand projections. Ask your state legislators whether similar legislation exists or is being considered.
Community Takeaway
This IEA data transforms the data center electricity conversation from projection to confirmed trend. When utilities or developers tell communities that demand growth is “uncertain” or “speculative,” point to this: data centers are already the largest single driver of U.S. electricity demand growth, and the IEA — the world's most authoritative energy body — expects that to continue for at least five more years. Communities evaluating data center proposals should demand that load forecasts account for this national trajectory, not just the single facility in front of them. The large-load tariff approach and load forecast accountability laws are two tools designed to prevent ratepayers from absorbing infrastructure costs driven by this demand surge.
Source: IEA, Fortune, Bloomberg, April 20, 2026.