Keith Downes Young (12 September 1848 - 1 December 1929) was an English architect best known for designing hospitals and school sanatoria.

Keith Downes Young was born in King's Road, Richmond, Surrey on 12 September 1848.

[4] By 1886 he had entered into partnership with the church architect, Henry Hall, and their practice acquired a reputation for designing hospitals and school sanatoria.

[3] The partnership of Young and Hall was considered to be the pre-eminent British architects in the designing of hospitals.

[5] Keith Downes Young died on 1 December 1929 and was buried on the eastern side of Highgate Cemetery.