Inaruwa (Nepali: इनरुवा) is a municipality and headquarters of Sunsari District located 25 km (16 mi) east of the Koshi Barrage and 18.6 km (11.6 mi) east of Koshi Tappu Wildlife Reserve in Province No. 1, Nepal. It covers an area of 77.92 km2 (30.09 sq mi).