Glencullen (or Glencullin) Lower is not heavily populated, with just 12 residents as of the 2011 census. However, in the 19th century it contained about 40 houses within a radius. In 1842, the road connecting Glencullen with Muingingaun was sanctioned and during the Public works for the Distress in 1847 the road from Glencullen to Bangor was laid, costing £150.