John Ogden Merrill FAIA (10 August 1896 – 13 June 1975) was an American architect and structural engineer.

He is credited with establishing the multi-disciplinary nature of the firm,[6] and the innovative character of SOM’s organization and culture was influenced at an early stage by Merrill and other architectural engineers who later became partners in the practice.

[7] SOM defined a new architectural approach of teamwork and total or comprehensive design.

[8] The firm undertook the coordination of every aspect of a specific project – design, engineering, landscaping, urban planning and interiors.

In 1969, he lent his name to a campaign to encourage men and women to pledge that they would not buy fur coats or any other articles made from skins of wild animals.