Winthrop More Daniels (September 30, 1867 – January 3, 1944) was an American government official and university professor.

A friend and onetime assistant of then-Professor Woodrow Wilson, President Wilson appointed Daniels, then a member of the New Jersey Board of Public Utilities to the Interstate Commerce Commission in 1914, and stood by him through a bitter confirmation battle in the Senate.

[6] While on the Commission, Daniels authored a rate case opinion involving the Passaic Gas Company, in which he added intangible value for goodwill to the physical value of the corporation.

On November 21, 1913, Interstate Commerce Commissioner John Hobart Marble died after an attack of acute indigestion.

Wilson refused to withdraw the nominations, stating that he would be personally responsible for Daniels' success as an ICC member.