Andersen is a surname. It may also refer to:
Andersen, a professional services firm in the US that provides tax, valuation, financial advisory, and consulting services Andersen Air Force Base, Guam, a United States Air Force base Andersen Consulting, former name of Accenture, Plc Andersen Corporation, a manufacturer of windows and other building supplies Andersen Global, an international association of legally separate, independent member firms Andersen Press, a publisher
See also Andersen's disease Arthur Andersen, a former tax and consulting firm Pea Soup Andersen's, a restaurant chain in California