DoorDash adds Costco as a same‑day option across the U.S.
Costco and DoorDash announced a nationwide rollout on Sept. 17 that lets U.S. Costco members order same‑day delivery from local warehouses through the DoorDash app. The move immediately adds a broadly searched, membership‑based retailer to DoorDash’s grocery assortment and gives marketers another national channel to reach Costco customers.
What changed
DoorDash will offer more than 4,000 Costco SKUs for same‑day delivery, fulfilled from local warehouse locations. Shoppers can search for Costco in the DoorDash app, sign in with their Costco membership to complete purchases, and—if they are not members—see information on how to join.
The launch extends a DoorDash–Costco relationship already live in Australia, New Zealand, Sweden, Iceland and Puerto Rico. It also coincided with expanded ordering options between Costco and Uber Eats in the same week, underscoring Costco’s reliance on third‑party partners to broaden same‑day reach.
How it will work for members and sellers
Available categories at launch include groceries, pantry staples, household essentials, Kirkland Signature (Costco’s private label) items, seasonal merchandise and some electronics. DoorDash’s last‑mile network will handle same‑day delivery from participating warehouses.
Mike Goldblatt, DoorDash’s vice president of enterprise partnerships, said the company added Costco in response to demand from both Costco members and DoorDash users; DoorDash had listed Costco among the most‑searched retailers not previously on its platform.
Costco already partners with multiple delivery services, including Instacart and Uber Eats. CEO Ron Vachris has told investors that same‑day delivery through third‑party partners has “become a highly effective way to deliver more convenience” to members.
Why this matters to marketers and retailers
For DoorDash, adding Costco expands grocery assortment and brings a high‑value, membership‑gated retailer into its ecosystem—potentially increasing basket sizes and repeat ordering across food, household and nonperishable categories.
For Costco, partnering with DoorDash extends same‑day reach without new fulfillment infrastructure. That matters against a backdrop of strong online grocery demand: Brick Meets Click analysis cited in the announcement found online grocery sales rose by at least 20% year over year for six consecutive quarters through Q1 2026.
For brands and agencies, the integration creates new merchandising, advertising and promotional opportunities inside the DoorDash app. It also complicates channel strategy for sellers who already route visibility and pricing through Instacart or in‑warehouse pickup.
Practical questions and operational risks
Key unknowns that will determine how disruptive this channel becomes include:
– Assortment parity and pricing versus other partners and in‑store shelves.
– Delivery and service fees, minimum order rules, and membership gating for checkout.
– Advertising placements, promotional mechanics and whether DoorDash and Costco pursue joint promotions or membership‑linked benefits.
– Fulfillment costs, substitution and return policies, and inventory synchronization between warehouses and DoorDash’s order flow.
Those details will drive how brands price, promote and measure performance on the new channel.
What to watch next
Marketers and e‑commerce teams should evaluate the DoorDash channel on three early metrics: visibility (search and merchandising placements inside the app), economics (fees, average order value and fulfillment cost), and customer experience (delivery speed, substitutions and returns). Track consumer feedback and early sales lift closely, and be prepared to adjust pricing and promotion if assortment or fee structures differ from other partners.
Costco ranks seventh in Digital Commerce 360’s Top 2000 Database and is the fourth‑largest Mass Merchant on that list—context that explains why its platform choices ripple across the online‑grocery and quick‑commerce ecosystems.
For now, the takeaway is simple: DoorDash is a national distribution and merchandising channel for Costco assortments. Brands that sell through Costco should assess how the DoorDash integration affects visibility, pricing and promotional strategy, and monitor the partnership’s operational details as they emerge.
