St Dennis (Cornish: Tredhinas) is a civil parish and village in Cornwall, England, United Kingdom.

[citation needed] The village is famous for its church built on the site of an Iron Age hillfort.

Much of the parish is up to 500 feet above sea level, and the countryside is moorland with small fields enclosed by earth-covered granite walls known as 'hedges'.

The church is situated on top of a hill overlooking the village and has views over Goss Moor to the sea at Newquay.

The Cornwall Energy Recovery Centre A is an incinerator built near St Dennis by French company SITA.

The initial planning application was rejected in 2009 following opposition by the Parish Council over worried about the effects of pollution and extra traffic.

Work restarted in August 2012 which was carried out by CORMAC, a company wholly owned by Cornwall Council.

The traditional location for Cornish wrestling tournaments was the small field behind the Commercial Inn,[12] currently being used as a dumping ground.