Kenneth A. MacDonald Jr. (1880–1937) was an American architect, known for his residential and commercial work in San Francisco and Los Angeles.

[1] MacDonald trained at École des Beaux-Arts in Paris, as did his early architecture partner George Adrian Applegarth.

[1] The firm of MacDonald & Applegarth collaboration starting in 1907 and they worked together on over 30 residences in San Francisco, including the Spreckels Mansion (1912) in San Francisco owned by Adolph B.

[2] His office for Couchot & MacDonald were located at 234 Pine Street, San Francisco.

[3] Kenneth MacDonald Jr. died in Los Angeles in December 1937.