Sir Henry Duncan Littlejohn MD LLD FRCSE was a Scottish surgeon, forensic scientist and public health official. He served for 46 years as Edinburgh's first Medical Officer of Health, during which time he brought about significant improvements in the living conditions and the health of the city's inhabitants. He also served as a police surgeon and medical adviser in Scottish criminal cases.

Perth Academy is a state comprehensive secondary school in Perth, Scotland. It was founded in 1696. The institution is a non-denominational one. The school occupies ground on the side of a hill in the Viewlands area of Perth, and is within the Perth and Kinross Council area.