Supaul district is one of the thirty-eight districts of Bihar, India. The town Supaul is the district's administrative headquarters. The district, which was split from the former Saharsa district on 14 March 1991, occupies . Supaul, which was previously a part of Saharsa district, is now part of the Mithila region. Mithila first gained prominence after being settled by Indo-Aryan people, who established the Mithila Kingdom (also called Kingdom of the Videhas). During the late Vedic period (c. 1100–500 BCE), Videha, along with Kuru and Pañcāla, became one of the major political and cultural centres of South Asia. The kings of the Videha Kingdom were called Janakas. The Videha Kingdom was later incorporated into the Vajjika League, which had its capital in the city Vaishali, which is also in Mithila. Supaul district occupies and is bounded by Nepal to the north, Araria district to the east, Madhepura and Saharsa districts to the south, and Madhubani district to the west. Supaul district is a part of Kosi division. The Koshi River flows through the district, which is regularly affected when it floods. R K Singh, IAS is a former Indian bureaucrat served as Home Secretary to GoI and a member of the Indian Parliament since May 2014. Syed Shahnawaz Hussain, BJP spokesperson and former Union Minister is also from Supaul. Udit Narayan was born in the village of Baisi in the district of Supaul. Sharda Sinha Lalit Narayan Mishra Govind Kumar Singh, a fashion designer Prabesh Choudhary, a cyber security expert The Supaul district comprises the following four sub-divisions: Supaul Sadar Birpur Triveniganj Nirmali There are a total of eleven blocks in the Supaul District: Basantpur (Parts of Birpur Sub-division) Raghopur (Parts of Birpur Sub-division) Pratapganj (Parts of Birpur Sub-division) Supaul (Parts of Supaul Sadar Sub-division) Kishanpur (Parts of Supaul Sadar Sub-division) Saraigarh-Bhaptiyahi (Parts of Supaul Sadar Sub-division) Pipra (Parts of Supaul Sadar Sub-division) Triveniganj (Parts of Triveniganj Sub-division) Chhatapur (Parts of Triveniganj Sub-division) Nirmali (Parts of Nirmali Sub-division) Marauna (Parts of Nirmali Sub-division) Supaul Lok Sabha is one of the 40 Lok Sabha (parliamentary) constituencies in Bihar state.