Arsi

Arsi may refer to:
 * Arsi Province, a former province of Ethiopia
 * Arsi Zone, a zone within the Oromia region of Ethiopia
 * West Arsi Zone, a zone within the Oromia region of Ethiopia
 * Arsi Mountains National Park in Arsi Zone
 * Arsi Oromo, an Ethiopian clan of the Oromo people
 * Loqoda Arsi, a dialect of Oromo language
 * Ārśi, the original name, in the Tocharian languages for the city of Agni (Chinese Yanqi), later Karasahr as well as the surrounding area and its inhabitants
 * ARSI – Amateur Radio Society of India