Cyffylliog (sometimes Welsh: Y Gyffylliog) is a village and community in Denbighshire, Wales.

The community covers an area of 12.20 square miles (31.59 km2) and includes the hamlet of Bontuchel and a section of Clocaenog Forest.

[4] The village has a small, bilingual primary school, Ysgol Cyffylliog, which had 25 pupils in 2011.

[5] The village church, St. Mary's, dates from the late 12th century but has been extensively renewed since that time including an almost complete rebuilding in 1876.

[6] Although the church has been arduously restored, it retains its late medieval ceiling and an unusual Georgian ‘hearse house’.