In September 2015, Constituent Assembly of Nepal declared country’s new administrative structure. The country is divided into seven federal states (State 1, State 2, State 3, State 4, State 5, State 6, and State 7) administratively. The demarcation of the federal states involves inclusion of selected districts within its boundaries. Though entire districts were selected for inclusion in most cases, two districts, namely, Rukum and Nawalparasi, were split to two separate states.

The following chart highlights the distribution of the districts into the seven federal states by ecological zones and development regions:

State 1 Ecological region Eastern Development Region
Mountain Taplejung, Sankhuwasabha, Solukhumbu
Hill Panchthar, Dhankuta, Terhathum, Bhojpur, Okhaldhunga, Khotang, Udayapur
Terai Ilam, Jhapa, Morang, Sunsari
State 2 Ecological region Eastern Development Region Central Development Region
Terai Saptari, Siraha Dhanusha, Mahottari, Sarlahi, Rautahat, Bara, Parsa
State 3 Ecological region Central Development Region
Mountain Dolakha, Sindhupalchowk, Rasuwa
Hill Dhading, Makwanpur, Sindhuli, Ramechap, Kavrepalanchowk, Lalitpur, Bhaktapur,
Kathmandu, Nuwakot
Terai Chitwan
State 4 Ecological region Western Development Region
Mountain Manang, Mustang
Hill Gorkha, Lamjung, Tanahu, Syangja, Kaski, Myagdi, Parbat, Baglung
Terai Nawalparasi (east)
State 5 Ecological region Western Development Region Mid-western Development Region
Hill Gulmi, Palpa, Arghakhanchi, Pyuthan, Rolpa, Rukum (east)
Terai Nawalparasi (west), Rupandehi, Kapilvastu Dang, Banke, Bardiya
State 6 Ecological region Mid-western Development Region
Mountain Jumla, Dolpa, Kalikot, Mugu, Humla
Hill Rukum (west), Salyan, Surkhet, Dailekh, Jajarkot
State 7 Ecological region Far-western Development Region
Mountain Bajura, Darchula, Bajhang
Hill Doti, Achham, Baitadi, Dadeldhura
Terai Kailali, Kanchanpur