Large companies like Airgas provide high-pressure gas cylinders for both industrial and medical needs, often offering online ordering with local branch pickup.

Finding oxygen tanks locally depends on whether you need a medical-grade prescription tank or an over-the-counter (OTC) canister for supplemental use. Medical oxygen is regulated as a drug and typically requires a prescription from a healthcare provider. Where to Buy Near You

For non-medical, supplemental oxygen (95% pure), Boost Oxygen is widely available at major pharmacies like CVS , Walgreens , and Walmart . "The Breath of Fresh Air" Review An overview of the buying experience.

Retailers like American Medical Sales and Rentals or OxiMedical focus specifically on oxygen therapy, including portable concentrators and tanks.