William Voorhees Judson (February 16, 1865 – March 29, 1923) was an American brigadier general, who served as a military aide with the Root Mission to the Russian Provisional Government.

[3] James W. McAndrew, Peyton C. March, Robert Lee Howze, John Louis Hayden, Peter Charles Harris, Edward Anderson, William Robert Dashiell, William M. Morrow and Eli Alva Helmick were among his classmates who would, like Judson himself, ultimately attain general officer rank.

[3] In July 1899, he was promoted to Chief Engineer and President of the Board of Public Works of Puerto Rico, where he served until August 1900.

[1][6] During this time, he conducted the first face-to-face meeting between a US diplomatic representative and a Bolshevik leader when he met with Leon Trotsky on December 1, 1918.

[1]Judson spent the remainder of his career working as the district engineer in Chicago, Illinois, retiring in August 1922 due to disabilities.