Who is the largest pharmacy in the world?

The World’s Largest Pharmacy Chain

Walgreens Boots Alliance holds the title of the largest pharmacy chain in the world, a position earned through decades of growth, strategic mergers, and a vast global footprint. Headquartered in Deerfield, Illinois, this American giant operates more than 18,500 stores across 11 countries, serving millions of customers every single day.

The company was formed through the merger of Walgreens and UK-based Alliance Boots, creating a powerful international presence. In the United States, Walgreens is a household name—its iconic orange logo found on street corners in cities and suburbs alike. But its influence stretches far beyond American borders. From pharmacies in Germany and Switzerland to stores in Thailand and Norway, Walgreens Boots Alliance has built a truly global network.

What sets it apart isn’t just size, but scope. Beyond dispensing prescriptions and selling over-the-counter medications, the chain offers health and wellness services, photo printing, beauty products, and seasonal essentials. Many locations even host in-store clinics, making healthcare more accessible to communities.

Despite growing competition from online retailers and big-box stores with pharmacy services, Walgreens Boots Alliance remains at the forefront by adapting quickly—investing in digital health tools, loyalty programs, and same-day delivery options.

Still, challenges remain. The company has faced financial pressures and store closures in recent years, particularly in the UK. Yet, its scale and reach keep it firmly on top. For now, if you're asking who runs the largest pharmacy network in the world, the answer is clear: Walgreens Boots Alliance.