Colin McWilliam (1928–1989) was a British architecture academic and author.
Born in London, he graduated from the University of Cambridge and became Director of the Scottish National Buildings Record, then the Assistant Secretary of the National Trust for Scotland. He also directed architectural history and conservation at Edinburgh College of Art, and later Heriot-Watt University. He was a founder of the Dictionary of Scottish Architects Project, and was instrumental in setting up the Architectural Heritage Society of Scotland.
In the 1970s, he was approached by Sir Nikolaus Pevsner who, having completed the series The Buildings of England, was keen to extend the project to cover the rest of the UK. McWilliam went on to co-write two volumes in The Buildings of Scotland series and became the project's editor.
He designed a desk and a bookcase incorporating copies of a portrait medallion of Robert Adam by James Tassie, for the Cabinet Room in Bute House, the official residence of the First Minister of Scotland.
- Culross: A Short Guide (1962)
- Scottish Townscape (1975)
- Lothian, except Edinburgh. Buildings of Scotland (1978)
- Edinburgh. Buildings of Scotland. (1984) (with David Walker and John Gifford)
- "The History of the Dictionary of Scottish Architects Project". Dictionary of Scottish Architects.
- Robertson, Eleanor (1997). "The Story of the Society" (PDF). Architectural Heritage Society of Scotland. Archived from the original (PDF) on 18 July 2011.
- Dictionary of Scottish Architects: Stewart Kaye