Arni

Arni may refer to:

Municipalities

 * Aarani, Tiruvannamalai, a town in Tamil Nadu, India
 * Arni, Maharashtra, in Yavatmal district, Maharashtra State, India
 * Arni, Karditsa, a municipality in the Karditsa regional unit, Greece
 * Arni, Aargau, a municipality of the canton of Aargau in Switzerland
 * Arni, Bern, a municipality of the canton of Bern in Switzerland

Other uses

 * Árni, Icelandic given name
 * a nickname for Arnold
 * Arni, Clerodendrum phlomidis, a traditional Indian medicinal herb
 * Arni or arnee, the wild water buffalo, Bubalus arnee
 * Lake Arni or Arnisee
 * ARNI, angiotensin receptor-neprilysin inhibitor: Valsartan/sacubitril