ASN may refer to:
Organisations:
- ASN Bank in the Netherlands
- ASN in Brookline/Boston, MA
- American Society of Nephrology
- American Society for Neurochemistry
- American Society of Neuroimaging
- American Society for Nutrition
- Archstone (former ticker symbol), a United States real estate investment trust
- Associated Screen News of Canada
- Association for the Study of Nationalities, an association devoted to the study of ethnicity and nationalism
- Autorité de sûreté nucléaire, the French nuclear safety authority
Other:
- Abstract Syntax Notation One (ASN.1)
- Adobe Solutions Network
- Advance Ship Notice
- All Sports Network
- American Saturday Night, a country music album by Brad Paisley
- Asparagine (Asn), an amino acid
- Associate of Science in Nursing
- Atlantic Satellite Network, a television channel in Canada now known as CTV Two Atlantic and sometimes still referred to as ASN
- The second-level domain name asn.au, reserved for Australian associations and non-profit organisations
- Autonomous System Number, an identifier for a collection of IP networks and routers under the control of one entity
- Avatar Spirit .Net, a fansite and community webpage for the television show Avatar: The Last Airbender
- Aviation Safety Network
- Addlestone railway station, United Kingdom (National Rail code)
- Talladega Municipal Airport (IATA: ASN)