Marling School is a grammar school with academy status for boys, with a co-educational sixth form, in Stroud, Gloucestershire, England. It is on the Cainscross Road, the main route out of Stroud towards the M5, and is next to the girls' grammar school, Stroud High School, with which it shares some facilities.

Marling School is the oldest secondary school in Stroud, having been founded in 1887 by Sir Samuel Marling, a local cloth manufacturer and former Liberal Member of Parliament, along with Sir Francis Hyett and Mr S.S. Dickinson.

In 1882, Sir Samuel Marling offered £10,000 towards the building of the school, and the school also inherited a number of endowments from the Red Coat School which was founded in 1642 by Thomas Webb, the St Chloe School founded at Amberley by Nathaniel Cambridge in 1699, and the educational charities established in the 17th and 18th centuries by William Johns and Robert Aldridge.

The new school opened to fee-paying pupils, which included some boarding students, in 1889. In 1909, under a new scheme the school became a public secondary school. Its endowments, along with those of the Stroud School of Science and Art and the Stroud High School for girls, were placed under the administration of a body called the Stroud Educational Foundation.

The old school houses were built shortly after the school's foundation, designed by W. H. Seth-Smith.

In 1965, the school was amalgamated with the Stroud Technical School for Boys which had been founded on a neighbouring site in 1910. The Technical School buildings now form the Art and Drama departments.

The head teacher David Lock was dismissed for gross misconduct in 2007 after allegations of bullying.

Following the appointment of Stuart Wilson as the new headteacher in 2010, Marling School converted to an academy in August 2011.