Mount Kelly was established in June 2014 following the merger of two neighbouring schools,
Kelly College and
Mount House School. Kelly College was founded in 1877 after Admiral
Benedictus Marwood Kelly left the great part of his real and personal estate to trustees, founding a charity which he directed should be called 'The
Kelly College', which should be for the education of the 'sons of Naval officers and other gentlemen'. Mount House School was founded in 1881 by Miss Parker and Miss Tubbs at Alton House, Tavistock Hill,
Plymouth. In 1890 the school moved location to North Hill, Plymouth (now the site of St Matthias church hall), moving in 1900 to larger premises at Mount House, Approach Road, Plymouth (the birthplace of Miss Tubbs). Plymouth was heavily bombed in
World War II and the school relocated to a 50-acre site at Mount Tavy in 1940. Mount House School became co-educational in 1996 with a pre-prep established for 3- to 7-year-olds ten years later. ==Co-curricular activities==