| John H. MacMillan Sr. | |
| Birth Date: | August 11, 1869 |
| Birth Place: | La Crosse, Wisconsin, US |
| Death Date: | October 20, 1944 (aged 75) |
| Resting Place: | Oak Grove Cemetery, La Crosse, Wisconsin |
| Nationality: | American |
| Occupation: | Businessman |
| President of Cargill | |
| Term: | 1909-1936 |
| Predecessor: | William Wallace Cargill |
| Successor: | John H. MacMillan Jr. |
| Spouse: | Edna Clara Cargill |
| Children: | Cargill MacMillan John H. MacMillan Jr. |
John Hugh MacMillan Sr. (August 11, 1869 – October 20, 1944) was an American businessman, president of Cargill from 1909 to 1936.
John Hugh MacMillan was born in La Crosse, Wisconsin, the son of Duncan McMillan, a director of the State Bank of La Crosse, and Mary Jane McCrea.[1] His father's grand house was opposite a similarly grand house owned by William Wallace Cargill, and the offspring of both families played together as children.[1]
At age 15, MacMillan started work at the State Bank of La Crosse, where his father was a director.[1]
On the death of his father-in-law, he took over the leadership of Cargill.[2] Following a heart attack, his son, John H. MacMillan Jr. took over as president in 1936, and remained in post until his death in 1960.
He married Edna Clara Cargill (1871–1963), the daughter of William Wallace Cargill, the founder of Cargill, and they had two sons, each of whom inherited one-third of Cargill:
He died on October 20, 1944.[3] [4] Both he and his wife are buried at Oak Grove Cemetery, La Crosse, Wisconsin.