US data centers consume about 176 terawatt-hours of electricity each year, equal to roughly 4.4 percent of national power use, according to World Resources Institute analysis. More than 4,500 active facilities draw that load today, and over 700 additional data centers are under construction across 38 states, signaling continued rapid expansion.

The national generation picture is shifting to accommodate the growth. US electricity generation is expected to reach about 4,400 terawatt-hours in 2026 and could rise to 5,200 terawatt-hours by 2030, a nearly 24 percent increase from 2023. A significant share of that incremental demand comes from data centers, particularly those built to support AI and high-performance computing.

AI workloads are especially demanding. They require dense computing power and continuous operation, producing high and constant electricity consumption that differs from the variable patterns of many other commercial users. That steady draw complicates grid planning, since utilities must size infrastructure for sustained peak load.

Forecasting the demand has proven difficult. The WRI analysis highlights wide uncertainty in projections, as utilities, developers, and analysts work with rapidly changing assumptions about AI growth, efficiency gains, and project timelines. Regional concentration adds further strain, with clusters of facilities placing outsized demand on specific grids. The data illustrates a national electricity system absorbing a fast-rising and geographically uneven new source of demand, even as the precise scale of future growth remains a subject of active debate.

Source: World Resources Institute - https://www.wri.org/insights/us-data-centers-electricity-demand