- AARP: Understanding Hoarding Disorder
- ADAA: Understanding the Basics of Hoarding
- Clutterers Anonymous: Am I a Clutterer?
- Compulsive-Hoarding: About, Research, Treatment, and Support
- Help for Hoarders: Helping Hoarders Help Themselves (top tips)
- Hoarders Anonymous: Video Archive
- International OCD Foundation: Hoarding Center
- Mayo Clinic: Definition, Symptoms, and Causes of Hoarding
- The Hoarding Project: What is a Hoarding Disorder?