John King Stack Jr. (February 13, 1884 – January 18, 1935) was a Michigan politician who served as Michigan Auditor General from 1933 to 1935.

[1] In 1928, Stack was an alternate delegate to the Democratic National Convention from Michigan.

In 1930, Stack unsuccessfully ran for the position of Michigan Auditor General.

Stack unsuccessfully ran in the Democratic primary for the Governor of Michigan in 1934.

Stack is interred in the Holy Cross Cemetery in Escanaba.