Riha could refer to any of the following items.
- Riha (garment) - an Assamese traditional garment
- Rīḥā or Arīḥā - a city in Syria
- Şanlıurfa - a city in Turkey
- RIHA - International Association of Research Institutes in the History of Art, Paris
- RIHA - The Management System of State Information System of Estonia
- RIHA - a Dutch electronic organ buider, for instance of the Riha Adagio
Riha is part of a three piece Assamese traditional garment worn with the Mekhela chador.