Trewan Hall (pronounced Trew-an) is a historic manor house in the parish of St Columb Major, Cornwall, England, UK.

The surviving Jacobean style manor house is located one mile north of the town.

The house and gardens, which now includes campsite grounds, has been privately owned by its current owners since 1960.

Further alterations were executed in the late 19th century including a number of Gothic Revival windows added in the perpendicular style.

The campsite is still ran by the family and has developed to cater for 170 pitches spread over 36 acres of woodlands and fields.

The site includes a 25m heated swimming pool, several blocks of facilities, a playpark, a camp shop, and other amenities.

In high season the barns open to local entertainment and there are various food options through the week.

[2] Several generations of the Vivian family lived in nearby Trenoweth before the manor house was built in Trewan circa 1633.

In 1697, only-child Mary Vivian,[3] of Trewan Hall, St Columb Major, married her distant cousin Sir Richard Vyvyan, 3rd Baronet of Colan, Cornwall.

[6] He was the brother of Prior Vivian of Bodmin Purchased Trenoweth manor from the Denzell family.

He was buried in the North isle of St Columb Church, where there is a mural tablet in memory of Thomas Vivian and Ann, for forty years his wife.

He married three times; firstly Anne, daughter of Sir John Trelawny; she died 17 March 1638, and there is a memorial to her in St Columb's church.

Was a Barrister in Law, married Ann, daughter of Matthew Hals of Efford near Plymouth, by whom he no issue.

Mary and Richard were imprisoned in the Tower of London for some time for supporting James Francis Edward, Prince of Wales' claim to the throne, participating in the unsuccessful Jacobite uprising in Cornwall of 1715.

Also 4 daughters; 4th son of Sir Richard Vyvyan and Mary Vivian, inherited Trewan.

[13] He was a Justice of the Peace and Deputy Lieutenant and his residence, Trewan, was left to his cousin the Rev.

Sir Vyell Donnithorne Vyvyan of Trelowarren, 9th Baronet, along with adjacent farms and lands of about 1,800 acres (730 ha).