Data Center Alley: Ashburn, VA's Data Center Hub (2026 Guide)

Just outside of Washington D.C., a new kind of capital has been developing in Northern Virginia (NoVA). Through decades of innovation, government incentive, and private sector investment, NoVA’s Fairfax and Loudoun counties have become home to Data Center Alley, the internet capital of the world.

What is Data Center Alley?

Data Center Alley is home to a cluster of data centers, businesses, and government organizations in Ashburn, Virginia, in Loudoun and Fairfax counties. It is the densest concentration of data centers in the world, and an estimated 70% of global internet traffic passes through it each day. As of 2025, Northern Virginia hosts close to 50 million square feet of data center space and more than 4,900 megawatts of commissioned power.

Photo Source: VEDP.org

But what is drawing all of these companies to Data Center Alley for their data center and colocation needs in the first place?

A Brief History

Many people don’t know that “the internet” existed prior to the 1980’s. One of the earliest internet exchange points was funded by the Advanced Research Projects Agency (ARPA), a U.S. government agency based in Arlington, Virginia. ARPA developed the first interconnected packet sharing network in the late 1960s, known as ARPANET. Originally developed to facilitate communication between Pentagon funded research institutions and universities, ARPANET later transformed into the network of networks that would become the internet. Arlington’s early achievements in network connectivity laid the groundwork for what was to come in Virginia.

Momentum in the Northern Virginia data center community began in the 1990s when key players such as AOL and Equinix added locations in the area. But Data Center Alley’s reputation as a prime location for data centers and colocation was ultimately solidified when the Metropolitan Area Exchange-East (MAE-East), one of the first large internet peering exchanges, was relocated to NoVA in 1998. The relocation of MAE-East meant that a majority of the world’s internet traffic was now flowing through Data Center Alley. The road to relevance was not a straight line for Data Center Alley, however. The dot-com bubble in the early 2000s cast purpose-built internet data centers to the shadows, as overcapacity caused investors to fear that “if you build it, they might not come”.

Since the dot-com bubble, a new boom in data center construction has taken place due to increased server space demand. This growth in demand has been led by digitization, cloud migration and legislation, as well as a trend towards data center outsourcing. Data Center Alley significantly benefited from these trends thanks to its predetermined reputation and importance in the data center industry.

What’s so special about Data Center Alley, anyways?

What makes Data Center Alley so hard to replicate? Six factors keep Ashburn and the surrounding Northern Virginia data centers ahead of every other market:

• Power: A significant amount of energy is required to keep your network running and maintain an optimal climate for the IT equipment. The typical cost per megawatt paid by data centers in Data Center Alley is 28% lower than national average, due to access to Dominion Virginia Power as well as the Potomac River for server cooling needs.

• Fiber: Data Center Alley has access to countless redundant fiber optic loops (terrestrial in NoVA and subsea in Virginia Beach) and cross connect opportunities that provide access to businesses and ISPs throughout the region. A robust fiber network offers compounding network effects due to improved connectivity, redundancy, and disaster recovery options.

• Supportive Government: The State of Virginia was a first mover in pro-data center legislation and policy; when VA enacted its first data center tax exemption in 2009, only seven other states offered similar incentives, while today over 30 states offer these incentives. Such incentives include a 6% sales and use tax exemption (on servers, generators, chillers and server-related equipment) and tax deductibility of recruitment and training cost for new job creation.

• Competent Workforce: Data Center Alley benefits from a talented workforce due to its proximity to Washington D.C. and the highly educated population of the region. In fact, over 60.0% of Loudoun county’s population has a bachelor’s degree vs. a national average of 36.0%. Additionally, Northern Virginia was ranked #2 for the top technology talent markets in a 2020 CBRE survey.

• Space to Build: While the Data Center Alley real estate market has been hot, commercial land available for development still exists in the area.

• Safe Location: Data Center Alley is in a location that does not experience adverse weather or natural disasters, providing a reliable ecosystem for data centers.

• Resources: NoVA is healthily populated with data center equipment and other resource providers.

An aerial view of major facilities in Data Center Alley in Ashburn, Virginia. Photo Source: ArcGIS.

Recent Trends in Data Center Alley

By Q1 2025, Northern Virginia data centers topped 4,900 megawatts of capacity, the largest market in the world and more than twice the size of its nearest global rival. Roughly 1,100 megawatts is under construction and around 5,500 megawatts is in planned development, with much of it pre-leased through 2028. Demand is now driven primarily by AI and hyperscale cloud growth.

Photo Source: Mordor Intelligence

• Hyperscalers: Hyperscalers such as Amazon Web Services and Microsoft Azure have led the charge in 2020 data center demand, as they require more capacity to service the widespread shift to online activity. For example, Amazon spent $73 million on 100 acres in Virginia in January 2020 and later announced plans to fast track construction on three more data centers as well.

Historical Northern Virginia Data Center Market Information. Source: CBRE Research, CBRE Data Center Solutions, H1 2020

• Constrained Supply Augmented by New Construction: COVID-19 driven demand in 2020 absorbed the supply of data center space in NoVA, resulting in a construction boom.

• Robust M&A and Investment Activity: Data center M&A in 2020 was record setting and Data Center Alley benefitted from the increased investor interest. Investors pay $2.0 million+ per acre in Data Center Alley due to its supreme data center ecosystem and connectivity opportunities.

Dominion Energy has announced plans to develop multiple utility scale solar projects in Virginia. (Photo: Dominion Energy)

• Continued Demand for Green Energy: Data Center Alley customers and a newly democratic majority government in Virginia continued to push for green data center energy in 2020. Dominion Energy has outlined several initiatives to help meet the demand.

• Pre-Leasing: To avoid overbuilding, many data center providers pre-lease data center space that is under construction. Many existing customers have a right-of-first-offer (ROFO) on the space, making it harder for new customers to enter an ecosystem.

Community and Environmental Impact

As Data Center Alley has grown, so has its footprint on Loudoun County communities. Data centers in the county used close to 1 billion gallons of water in 2023, and Northern Virginia data centers together used nearly 2 billion gallons, a roughly 63% jump from 2019. Data centers now sit close to homes, schools, and parks, and local debate over noise, water, and land use has become a defining feature of the region. For businesses evaluating Ashburn colocation, these factors increasingly shape site selection, sustainability commitments, and community relations.

What’s next for Data Center Alley?

AI, hyperscale cloud, and inference workloads are now the dominant drivers of demand, even as power and water constraints and community pushback shape where and how fast new capacity comes online. A pro-technology Virginia and a deep fiber and power ecosystem keep Ashburn at the center of the internet for the foreseeable future.

Interested in implementing a private or public cloud solution for your business? Lightyear will source quotes and manage implementation on your behalf. Click here to get started.

Did you enjoy this blog? You should check out our Dedicated Internet Access Pricing Guide, Wide Area Networking Pricing Guide, and SD-WAN Buyers Guide, if you haven’t already!

FAQ

What is Data Center Alley?

Data Center Alley is the cluster of data centers in and around Ashburn, Virginia, in Loudoun and Fairfax counties. It is the densest data center market in the world, and an estimated 70% of global internet traffic passes through it.

Why is Virginia called Data Center Alley?

Virginia earned the nickname because Northern Virginia, led by Loudoun County, hosts the largest concentration of data centers on earth. Early peering exchanges like MAE-East, cheap power, dense fiber, and data center tax incentives drew providers to the Ashburn area starting in the 1990s.

Where is Data Center Alley in Ashburn?

Data Center Alley runs along the Dulles Greenway (Route 267) corridor through Ashburn, Sterling, and Leesburg in Loudoun County, Virginia, near Dulles International Airport.

How much water do Ashburn data centers use?

Data centers in Loudoun County used close to 1 billion gallons of water in 2023, and Northern Virginia data centers together used nearly 2 billion gallons, up about 63% from 2019. A single large data center can use 1 to 5 million gallons of water per day for cooling.

How many data centers are in Loudoun County?

Loudoun County is home to roughly 200 data center facilities spanning close to 50 million square feet, with tens of millions more square feet in the pipeline. These Loudoun County data centers make up the core of Data Center Alley.

How do I find Ashburn colocation space?

To find Ashburn colocation space, compare providers across Data Center Alley on power, connectivity, and pricing. Lightyear sources quotes and manages implementation across Northern Virginia providers on your behalf.