Bagmati Zone was one of the fourteen zones of Nepal until the restoration of zones to Provinces. Its headquarters are Kathmandu. It was name…Bagmati Zone was one of the fourteen zones of Nepal until the restoration of zones to Provinces. Its headquarters are Kathmandu. It was named after the Bagmati River. It was in the Central Development Region of Nepal. The districts are now all part of Bagmati Province. The zone contains the Kathmandu Valley with its conurbation of 4.5 million inhabitants.