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