Walapane area cover about 320 km².  The population in 2001 recorded of 106,434 combination of 52,253 males and 54,181 females. Population density calculation shows 322.4 inh./km².  However, in 2012 population reduced to 103,152. In 2013 Walapane Electorate had 78,584 electors registered.

Official postcode used for Walapane is 22270. Literacy rate for Walapane stand at 83% in 2012, below the national average. About 8% of the population is older than 60 years. Currently Walapane Divisional Secretariat is the administrative authority for the region. In Walapane 70% of are Buddhists, 15% are Hindu, 7.5 % are Muslim and 7.5% are Christian.

Major towns in Walapane Divisional Secretariat includes Walapane, Ragala, Nildandahinna, Padiyapelella and Udapussallawa.