DoorDash has launched Costco delivery across all 639 warehouse locations in 47 U.S. states, marking its first partnership with the retailer in the United States. Costco members can order groceries, household essentials and electronics after linking their membership credentials to DoorDash. Uber Eats has also expanded Costco delivery from 17 states to nationwide coverage, following an agreement disclosed in 2024. The developments add to Costco's longstanding relationship with Instacart and come as delivery platforms expand grocery partnerships, including deals with Kroger and competition from Walmart.