The Fortified House in Scotland is a five-volume book by the Scottish author Nigel Tranter.

Written between 1962 and 1970, it covers almost seven hundred buildings in Scotland which fall under the general description of "fortalices, lesser castles, peel towers, keeps and defensible lairds' houses".

The work was an expansion of The Fortalices and Early Mansions of Southern Scotland 1400-1650, which Tranter had written in the 1930s.

The first four original volumes were published by Oliver & Boyd, with the fifth by W. & R. Chambers.

The work was reprinted in 1977 and 1986 by James Thin, under their imprint of The Mercat Press.