The original interior decoration was simple and in keeping with the medieval style of the exterior, but a revival of fortune in the mid-nineteenth century saw the 2^nd Earl commission Pugin to decorate the Drawing Room in his High Gothic Revival style. The impressive family tree over the mantelpiece emphasises the traditional claims of family and power. The 3^rd Earl Somers, Charles, continued the lavish decoration in the 1860s and '70s. Charles had extremely artistic tastes and was well educated; he was instrumental in his father's choice of Pugin's style and his own collections from his travels across Europe display wide knowledge and taste. The Flemish tapestries, 17^th century Italian furniture, medieval armour and Renaissance art that can be seen throughout the castle today were collected by Charles. Unusually amongst his piers, he bought very little Victorian furniture and the only contemporary artist he patronised was G.W. Watts. The most notable Victorian piece is the chandelier in the Gothic Drawing Room, which was exhibited at the Great Exhibition in 1851. There is an identical version in the House of Commons.

Among the numerous paintings on display at Eastnor are many with family connections. In the Entrance Hall are portraits of the builder of the castle, 1^st Earl Somers, and opposite him the Earl, later Duke of Shrewsbury, a great friend of John Somers, the Lord Chancellor from whom the family derived its wealth and status. In the Great Hall on the right of the right-hand fireplace (the dimensions of this room demand more then one) is a picture of William of Orange, who was so grateful to John Somers for legally proving the Protestant succession that he made him Lord High Chancellor. In the Dining Room hang more family portraits, of Lord Chancellor Somers, a Romney of the 1^st Earl and also his younger half-brother, Philip Cocks as a boy of five. This fellow is the great great great grandfather of the present owner, James Hervey-Bathurst. In the Octagon Saloon, which was painted in 1990 by Laura Jeffreys, there is a portrait of Ellen Terry, briefly married to Watts, and also a portrait of the beautiful Virginia, the wife of the 3^rd Earl Somers, sister of the early photographic artist Julia Cameron, some of whose work is displayed in the Turret Room, and also aunt of Mrs Leslie Stephen, mother of Virginia Woolf and Vanessa Bell. There is also a portrait of Tennyson, godfather of the late Lord Somers.

The Chinese Bedroom is furnished with 19^th century furniture and the walls are hung with 18^th century hand painted Chinese wallpaper. This room was the best guest bedroom and was used by Queen Mary when she visited Eastnor in 1937. The Red Bedroom was redecorated in 1991as a homage to the founder of the family fortunes, Lord Chancellor Somers. In the Dressing Room, as a contrast, hang the modern and contemporary collection of the present owners, including work by Augustas John, Susannah Fiennes and Emma Sargeant. In the State Bedroom downstairs, used by the 3^rd Earl, there is a Tintoretto. Castellated terraces, a lake and arboretum surround the castle.