Herbert James Hagerman (December 15, 1871 – January 29, 1935) was an American attorney, was the 17th Governor of the New Mexico Territory from 1906 to 1907.

After passing the bar, he practiced law in Colorado, where he had moved in order to be closer to his father's mining interests.

[3][4] Working closely with Ambassador Ethan A. Hitchcock, Hagerman impressed his boss with his abilities and his eagerness to stem waste and corruption.

In 1903 he was appointed to New Mexico's Board of Managers for the Louisiana Purchase Exposition, also known as the St. Louis World's Fair.

The leaders of New Mexico's political establishment submitted a long list of spurious charges against Hagerman to Roosevelt.