The Biggest Amazon Warehouses in the World (2025 Update)

When it comes to speed, scale, and reach, Amazon’s logistics network is unrivaled. In this 2025 update, we rank the biggest Amazon warehouses and identify the largest Amazon warehouse in the world—with a close look at major Amazon warehouse locations in the U.S. (including California), the UK, and Canada. From multi‑story robotics fulfillment centers to regional mega‑sites, these buildings power Amazon’s same‑day and one‑day delivery.

We’ll explore the biggest Amazon warehouses in the world, spotlight upcoming mega-sites, and break down the different types of Amazon facilities that make ultra-fast delivery possible.

Biggest Amazon Warehouses at a Glance (2025)

• Largest in the world (operational): Ontario, California ~4.06–4.5M sq. ft., 5–6 levels.
• Largest in California: Ontario, CA.
• Largest in Canada: Ottawa, ON (~2.8M) and Calgary, AB (~2.8M).
• Largest in the UK: Tilbury (London) (~2.0M).

The Biggest Amazon Warehouses and Fulfillment Centers

Largest Operational Amazon Facilities (by approximate total floor area)

Amazon Warehouse Locations	Approximate Size (sq. ft.)	Notes
Ontario, California, USA	4.5M	Largest operational Amazon warehouse in the world. Widely reported as Amazon’s largest warehouse globally; 5–6 stories.
Woodburn, Oregon, USA	3.8M	Largest Amazon FC in the Pacific Northwest; five stories, ~105 ft. tall.
Johnston, Rhode Island, USA	3.8M	New England mega‑site; ~1,500+ jobs; designed for high‑automation sortable items.
Wilmington, Delaware, USA	3.8M	Massive East Coast hub with advanced automation.
Suffolk, Virginia, USA	3.8M	Robotics FC; one of Virginia’s largest buildings.
Colorado Springs, Colorado, USA	3.7M	Strategic Rocky Mountain logistics hub.
Mt. Juliet, Tennessee, USA	3.6M	Multi-story fulfillment center with robotics integration.
Hyderabad, India (campus)	3M	Amazon’s largest office campus is not a warehouse but is worth noting.
Calgary, Alberta, Canada	2.8M	Among the largest in Canada; new robotics FC.
Ottawa, Ontario, Canada	2.8M	Canada’s largest at opening (2021); multi-level robotics FC.
Tilbury, London, UK	2M	Major European fulfillment center. One of the UK’s biggest and most automated FCs.
Dunfermline, Fife, Scotland	1.5M	UK’s most significant Amazon returns and fulfillment site.
Moreno Valley, California, USA	1.25M	Among California’s larger pre‑robotics era FCs.
Phoenix, Arizona, USA	1.1M	Known for employee mobility tools like bikes and carts. Multiple large DC/FC leases across the Valley (Mesa, Glendale, Buckeye).

Amazon Warehouse Locations Under Construction/Newly Announced

How Amazon Gets Packages to Customers

Amazon’s fulfillment network isn’t just made of big buildings; it’s a mix of facility types, sizes, and technologies.

Sortable Fulfillment Centers

• Average size: ~800,000 sq. ft.
• Staffing: 1,500+ full-time associates.
• Purpose: Pick, pack, and ship smaller items like books, toys, and housewares.
• Tech edge: Amazon Robotics works alongside employees to handle orders faster and more efficiently.

Non-Sortable Fulfillment Centers

• Size range: 600,000 to 1 million sq. ft.
• Staffing: 1,000+ full-time associates.
• Purpose: Handle larger or bulkier items like patio furniture, rugs, and sports equipment.

Sortation Centers

• Sort orders by destination before loading them on trucks.
• Enable everyday delivery for millions of customers, including Sundays.

Receive Centers

• ~600,000 sq. ft. facilities that take in large supplier shipments.
• Distribute fast-moving inventory to fulfillment centers for quick turnaround.

Specialty Sites

• Handle specific categories or seasonal surges (e.g., holiday peaks).
• Many offer part-time roles with paths to full-time.

Delivery Stations

• The final stop before orders reach customers.
• Coordinate last-mile delivery with Amazon’s van fleet, independent contractors, and partner carriers.

Why Size Matters for Amazon’s Operations

• Speed — Bigger buildings allow for broader inventory coverage, cutting delivery times.
• Efficiency — Robotics and AI boost throughput, even in massive footprints.
• Scalability — Mega-sites absorb seasonal surges like Prime Day and Black Friday.
• Economic Impact — New sites typically generate thousands of jobs each in operations, tech, and logistics.

Why So Many Amazon Warehouses in California?

Southern California’s Inland Empire, home to Amazon’s Ontario and Moreno Valley sites, is the perfect place for ultra-fast delivery. It sits next to the Los Angeles and Long Beach Ports, giving Amazon direct access to imported goods. With millions of customers just a short drive away and one of North America’s largest industrial real-estate markets, this region has become Amazon’s powerhouse for next-day and same-day shipping. Recent reports show the area’s warehouses are filling up faster than anywhere else, as mega-tenants like Amazon keep expanding through 2025.

Fun Amazon Prime Facts

Amazon Delaware

Amazon’s Wilmington, Delaware, fulfillment center spans five stories and totals about 3.8 million square feet—roughly the size of 66 football fields. The ground floor covers 640,000 square feet (around 14.7 acres), making it over seven times larger than California’s Hearst Castle. It’s one of the East Coast’s most advanced and spacious Amazon facilities.

Amazon Scotland

At Amazon’s Dunfermline, Scotland site, space is measured in superlatives. The building can hold the equivalent of 110 Olympic swimming pools or 14 football pitches of products. Inside, employees work along four miles of conveyor belts, moving boxes between departments for processing, gift wrapping, and labeling—a glimpse into Amazon’s European logistics scale.

Photo credit: Amazon

Warehouse Safety at Mega‑Scale: How Amazon’s Giants Stay Stable

Even at four million square feet, rack integrity makes or breaks uptime.

• Keep uprights within plumb: ANSI MH16.1‑2023 caps out‑of‑plumb at 1/240 of height for loaded columns (i.e., ≤ 0.5″ per 10′). Out‑of‑straight also 1/240—exceed and you must unload, plumb, repair/replace.
• Anchor correctly: Racks must be anchored to concrete; engineers specify anchor size/type/locations. Baseplates/anchors get larger in seismic zones, and the counts increase.
• Protect sprinklers and water flow: Maintain flue spaces (≈ 6″ transverse; ~ 3″ each side to uprights) so heat/water can rise/fall; respect NFPA 13 clearances (e.g., 36″ ceiling sprinkler head‑to‑load distance).
• Know and display capacity: Keep LARC drawings current and post load limits near eye‑level; recalculate when you change beam elevations or components.
• Inspection flow: Train staff for monthly in‑house checks and schedule annual third‑party compliance inspections by rack engineers (best practice).

Conclusion—Amazon’s Mega-Hub Future

From Ontario, California’s ≈ 4.1M+ sq. ft. giant to new 3.8M sq. ft. hubs in Oregon and Rhode Island, Amazon is leaning toward tall, automated, regionalized nodes. As footprints grow, so does the importance of engineered rack safety, from anchors to inspections.

Next step: Get your free checklist or talk to a Damotech expert to baseline rack integrity before the next peak.

Ontario, California, holds the current record at ≈ 4.06–4.5M sq. ft. total floor area (multi‑story). Precise figures vary by source; CoStar reported ≈ 4.06M, while later local coverage cited ≈ 4.5M and six stories.

Ontario (≈ 4.06–4.5M sq. ft.). Other large California sites include Moreno Valley (~ 1.25M sq. ft.) and multiple 1.1–1.2M sq. ft. facilities around the Phoenix–Inland Empire/Southwest region supporting CA deliveries.

Yes. Examples include Ottawa, Canada (≈ 2.8M sq. ft.), Calgary, Canada (≈ 2.8M sq. ft.), and Tilbury, UK (≈ 2.0–2.2M sq. ft.).

Sources

• Saasant: Amazon warehouse locations