How Many Costcos In The US: 2026 Footprint, State Counts, And Growth Analysis

As of 2026, Costco Wholesale operates 619 warehouse locations across the United States (including Puerto Rico). The warehouse club giant continues to anchor suburban and metropolitan retail markets, maintaining its position as one of the largest membership-only retail corporations globally. Understanding the geographical distribution, site selection criteria, and operational scale of these warehouses provides valuable insight into both retail real estate trends and consumer buying habits in the United States.

Evaluating this expansive brick-and-mortar footprint involves examining state-by-state density, real estate expansion methodologies, and the economic factors driving new unit development through 2026.

Current Geographic Distribution and State-by-State Density

The concentration of Costco warehouses in the US varies significantly based on regional population density, median household income, and local zoning laws. States with high population growth and strong suburban economic centers naturally claim the highest number of stores.

California maintains a commanding lead in total warehouse count, reflecting its massive consumer base and early adoption of the big-box membership model. Conversely, states with lower population densities or strict geographic barriers feature far fewer units, often relying on regional hubs to service large geographic radii.

Real Estate Strategy and Warehouse Specifications

Building and maintaining a network of over 600 massive retail boxes requires a standardized yet adaptable real estate blueprint. A typical Costco warehouse spans between 140,000 and 160,000 square feet, engineered to stock roughly 4,000 active stock-keeping units (SKUs). This limited SKU count is a core operational strategy, allowing the company to drive massive volume per item and negotiate aggressively low wholesale prices.

When corporate site-selection teams evaluate new markets in 2026, several non-negotiable parameters guide their investments:

• Population Thresholds: Trade areas typically require a minimum population of 200,000 to 300,000 residents within a 10-to-15-minute drive time.
• Infrastructure Access: Direct ingress and egress via major arterial roads and proximity to multi-lane highways to handle high commercial and passenger vehicle traffic.
• Parking Ratios: Ample surface parking, usually scaling to roughly 700 to 900 stalls per warehouse to accommodate peak weekend shopping rushes.
• Zoning Compliance: Securing heavy commercial or industrial-mixed zoning approvals, often requiring extensive traffic impact studies and environmental reviews.

Expansion Trends and New Openings Through 2026

Costco's domestic growth strategy relies on infill development—building new warehouses in established markets to relieve congestion at high-volume locations—alongside calculated expansion into emerging secondary markets.

Supply chain modernization has paralleled this physical expansion. To support the 619+ domestic warehouses, Costco operates a network of specialized regional depots and cross-dock facilities. These logistics hubs optimize freight consolidation, reducing transit times for perishable grocery items and high-turnover consumer packaged goods. Furthermore, the integration of automated inventory tracking systems allows store managers to monitor stock velocity in real time, ensuring high-demand items remain available despite ongoing supply chain fluctuations.

Comparing Costco's Domestic Footprint to Global Operations

While the United States remains the core revenue driver for the enterprise, Costco’s domestic store count represents a portion of its global real estate portfolio. Understanding how the US market compares internationally highlights the scalability of the membership warehouse model.

• US Domestic Market: Over 619 locations, characterized by mature suburban penetration and high average annual spend per member household.
• International Markets: Encompassing Canada, Mexico, Japan, the United Kingdom, South Korea, Australia, Taiwan, Spain, France, Iceland, Sweden, New Zealand, China, and growing newer territories. International units often generate exceptionally high sales volumes due to the novelty and perceived prestige of American wholesale goods.
• Membership Penetration: Domestic membership renewal rates consistently hover around 90%, proving that US consumers view the warehouse club fee as an essential household budget tool rather than a discretionary expense.

Step-by-Step Guide to Finding and Utilizing Local Warehouses

Navigating the US Costco network efficiently requires understanding membership tiers, digital tools, and optimal shopping windows.

1. Verify Membership Status: Ensure your Gold Star or Executive membership is active digitally via the official Costco mobile application, which eliminates the need to carry a physical plastic card.
2. Locate the Nearest Facility: Utilize the store locator tool on the corporate website or app, filtering by zip code to identify the closest warehouse, operating hours, and specific on-site amenities (such as gas stations, tire service centers, or optical departments).
3. Analyze Fuel and Service Availability: Check if your local warehouse features a Costco Gas Station. Arriving during off-peak hours (early morning or late evening) minimizes wait times at the pump.
4. Plan Around Peak Hours: Avoid weekends between 11:00 AM and 4:00 PM if you prefer a streamlined shopping experience. Tuesday and Wednesday mornings typically offer the lowest foot traffic.
5. Leverage Ancillary Services: Take advantage of included or discounted services such as pharmacy consultations, hearing aid evaluations, and travel booking portals to maximize the value of your annual membership fee.

Frequently Asked Questions About US Costco Locations

How many states in the US have a Costco warehouse?

Costco operates warehouses in 48 US states, plus Puerto Rico. As of 2026, Vermont and West Virginia remain the only US states without a physical Costco warehouse location.

Which US state has the most Costco locations?

California has the highest concentration of Costco warehouses in the United States, boasting well over 135 locations distributed across both Northern and Southern regions.

What is the average size of a US Costco warehouse?

A standard US Costco warehouse is approximately 146,000 square feet, though newer builds and high-volume locations can exceed 160,000 square feet to accommodate expanded fresh food and seasonal departments.

Are all US Costco locations open on major holidays?

No, Costco warehouses in the US are closed on major holidays including New Year's Day, Easter Sunday, Memorial Day, Independence Day, Labor Day, Thanksgiving Day, and Christmas Day.

How many members does the average US warehouse serve?

While exact figures fluctuate by region, a typical US Costco warehouse services an active base of roughly 60,000 to 70,000 member households, supported by a dedicated local workforce of 200 to 300 employees per building.

Maximizing Your Membership Value

Navigating the expansive US warehouse network requires strategic planning, whether you are managing household provisioning or small business inventory. By understanding the geographic distribution, leveraging digital tools for location-based services, and timing your warehouse visits outside of peak weekend rushes, you can extract maximum efficiency from your membership. For those planning commercial purchases or bulk acquisitions, reaching out directly to local warehouse managers ensures specialized business delivery options are fully utilized.