Ciara Maurizia Horne (born 17 September 1989) is a British racing cyclist. Having formerly represented Ireland at an international level, Horne has switched nationality and currently rides on the track for the Welsh Cycling backed Team USN, and also races on the road for the Breast Cancer Care racing team. Horne formed part of the Great Britain team who became 2014 European champions in the team pursuit.
Horne was brought up in Kenilworth, near Coventry, Warwickshire, and attended Stratford Girls' Grammar School, Horne obtained a First Class degree in Physiotherapy from the University of Birmingham in 2013.
Horne began her sporting life at the age of 7 as a swimmer. She competed at the national level until the age of 16 when she suffered a serious shoulder injury which required surgery. This prompted her to switch to triathlon, getting onto the world class start programme and competing at Salford Junior world cup where she finished 8th. However, plagued by injuries, Horne found that the majority of her training would be in the form of cycling and her love for the sport was born. Horne finally joined a cycling team in October 2009.
Horne qualified to represent Ireland through her mother. In July 2012, Horne renounced her Irish citizenship. Having held dual nationality, Horne qualified for a British racing licence through British Cycling. Horne's father was born in Barry, Vale of Glamorgan, Wales, she was therefore offered the opportunity to train with the Welsh Cycling Squad.
Horne represented Wales at the Commonwealth Games in Glasgow, 2014, competing in the time trial and individual pursuit.
She is engaged to racing cyclist Lewis Oliva.