ANCA or Anca may refer to:

Organizations ANCA (company), Australian manufacturing company Australian Nature Conservation Agency, now Environment Australia Antarctic Names Committee of Australia Armenian National Committee of America

Places Ançã (Cantanhede), civil parish in Portugal Ançã, town in Portugal

Science Anti-neutrophil cytoplasmic antibody, proteins detected in a number of autoimmune disorders C-ANCA, a type of autoantibody P-ANCA, a type of autoantibody

Other uses Anca (name), Romanian female first name Áncá language

See also Anka (disambiguation)