Adrian Horridge FRS FAA (born 12 December 1927) is an Australian neurobiologist and professor at Australian National University.

Horridge was born in Sheffield, England, to George William Horridge (1897-1981) and Olive (1899-1995), daughter of Albert Stray, who owned a chain of sweetshops.

William Horridge and Company, "Stag, Buck, Horn, Wood and Buffalo Handles, and Scale Cutters"- since 1750, producing amongst other things ivory scales for piano keys, combs, and knife handles.

His paternal grandfather was the last to be involved with the company, which was sold in 1921 for £15,000 ("when you could buy a house for £100"); after World War I, Horridge's father started a motorbike repair and sale business in his back yard, which expanded until he and a business partner were substantial motorcycle agents with a showroom and repair shops.

He obtained a scholarship to St John's College, Cambridge in 1946.

He earned a PhD from the University of Cambridge and was appointed to a Fellowship in Chemistry at St. John's in 1953.

In 2001 he was awarded a Centenary Medal "for service to Australian society in the biological sciences".

Horridge was married for 59 years to Audrey (1930-2013), daughter of Rev. Harcourt Robert Henry Lightburne, vicar of St Mary's, Upchurch, Kent.