Charles Frederick Humphrey (Jr.) (August 11, 1876 – January 22, 1968) was a career United States Army officer who served for over 40 years during the first half of the 20th century, retiring as a brigadier general in 1940 one year before the entry of the United States of America into World War II.

In his early career, as a first lieutenant, he received the Distinguished Service Cross for actions against insurgents in the Philippines on August 16, 1899.

Appointed a brigadier general in the 1930s, Humphrey commanded an infantry brigade and also did what he could to convince army leaders that America would almost certainly be involved in the next coming World War which, by 1935, was already obviously on the horizon with Nazi Germany and Imperial Japan.

Humphrey was a strong advocate of better training and equipment; thoughts which were also voiced by senior army leaders such as George C. Marshall and Douglas MacArthur.

[1] This biographical article related to World War I United States Army is a stub.