- DARN stands for Dual Auroral Radar Network
- DARN stands for Disaster Amateur Radio Network (California)
- DARN stands for Duty Appointed Retention NCO (Non-Commissioned Officer; US Army)
- DARN stands for Diocese Amateur Radio Network (Florida)
- DARN stands for Developing Areas Research Network (Newcastle University; Newcastle upon Tyne, England, UK)
- DARN stands for Dayton Asperger Resource Network (Dayton, OH)
DARN