The population of the Knockaderry electoral division (including the village and surrounding rural catchment) is approximately 500 people.

The other village in the parish is Cloncagh, originally spelt 'Clouncagh', which comes from the Irish Cluain Cath, meaning 'the meadow of the battle'.

[3] The village of Knockaderry was burned to the ground in 1789 when, reputedly, a maid "Carelessly left a candle lighting when retiring to rest.

This set fire to some straw in the room and the flames spread rapidly to the little street consuming all before it, but fortunately no lives were lost".

There was originally a school, called Scoil Mhuire Achadh Lin, built in a part of Knockaderry before entering it.