The top U.S. colocation markets in 2025 are defined by absorption, interconnection density, and expansion capacity. Northern Virginia continues to dominate with nearly half of national absorption, while Chicago, Phoenix, Dallas–Fort Worth, and Atlanta are establishing themselves as Tier I hubs. Emerging markets like Austin–San Antonio and Denver are on the rise, and Miami is one to watch as a LATAM gateway. These metros represent the most strategic nodes for hyperscalers, enterprises, and AI workloads. This list covers the 10 most strategic U.S. colocation hubs in 2025, backed by the latest insights from JLL (2024 Data Center Outlook) and other industry leaders. Whether you’re looking for interconnection density, expansion capacity, or strategic proximity to end users, these markets represent the most critical nodes in America’s data center ecosystem.