Charles River Laboratories International Inc (Charles River) is a contract research organization (CRO) that provides essential products and services to accelerate the research, drug discovery and development. It offers various basic research, drug discovery and safety assessment services.

The organization also offers clinical, manufacturing and operations and staffing support. It provides solutions focused on therapy areas related to cardiovascular, central nervous system, metabolic, inflammation, oncology, ophthalmology, respiratory and musculoskeletal disorders.

Charles River provides products and services to pharmaceutical and biotechnology companies, government agencies, besides leading hospitals and academic institutions. It operates through a network of facilities worldwide.

Charles River is headquartered in Wilmington, Massachusetts, the US.