James Robert Mann (October 20, 1856 – November 30, 1922) was an American politician and attorney who served as a member of the United States House of Representatives from Illinois from 1897 to 1922.

[1] James Robert Mann was born near Bloomington, McLean County, Illinois, on October 20, 1856.

He is probably best known for his authorship of the Mann Act of 1910, which was a reaction to the "white slavery" issue and prohibited transportation of women between states for purposes of prostitution.

"[3] He was a leading opponent of the Harrison Narcotics Tax Act and Prohibition, despite the popularity of such legislation amongst his fellow Midwestern progressives.

Mann died in Washington, D.C., of pneumonia on November 30, 1922, at age 66 before the close of the 67th United States Congress.