ANCA or Anca may refer to:
- Anca (name), Romanian female first name
- Áncá language
- Ançã (Cantanhede), civil parish in Portugal
- Ançã, town in Portugal
Organization
edit- Australian Nature Conservation Agency, now Environment Australia
- Antarctic Names Committee of Australia
- Armenian National Committee of America
Business
edit- ANCA (company), Australian manufacturing company
Science
edit- Anti-neutrophil cytoplasmic antibody, proteins detected in a number of autoimmune disorders
- C-ANCA, a type of autoantibody
- P-ANCA, a type of autoantibody