Product liability is the area of law in which manufacturers, distributors, suppliers, retailers, and others who make products available to the public are held responsible for the injuries those products cause. Although the word "product" has broad connotations, product liability as an area of law is traditionally limited to products in the form of tangible personal property.

In the United States, the claims most commonly associated with product liability are negligence, strict liability, breach of warranty, and various consumer protection claims. The majority of product liability laws are determined at the state level and vary widely from state to state. Each type of product liability claim requires different elements to be proven to present a successful claim.

Section 2 of the Restatement (Third) of Torts: Products Liability distinguishes between three major types of product liability claims:

However, in most states, these are not legal claims in and of themselves, but are pleaded in terms of the theories mentioned above. For example, a plaintiff might plead negligent failure to warn or strict liability for defective design.