Herbert Moore "Harry" Wicks (1889–1956), best known as "Harry M. Wicks," was an American radical journalist and politician who was a founding member of the Communist Party of America. He was a plenipotentiary representative of the Communist International to Australia in 1930-31 and there directed the reorganization of the structure and leadership of the Communist Party of Australia.

Harry M. Wicks is one of the most enigmatic leaders of the early American communist movement. Wicks was born in Arcola, Illinois on December 10, 1889, the son of an electrical engineer. He attended primary school in Arcola and grammar school in Algona and Des Moines, Iowa. He worked as a journeyman compositor in the printing industry.

Harry Wicks was an adherent of the John Keracher's Proletarian University tendency in the Socialist Party of Michigan from 1916.

Wicks was the candidate of the Socialist Party of Oregon for the US House of Representatives in the state's 3rd District in November 1918. Early the next year he was one of 28 candidates who ran for the SPA's governing National Executive Committee, failing to win election.

Wicks was the organizer and served as the President of the short-lived Council of Workers, Soldiers, and Sailors in Portland, Oregon in 1919. Wicks was also the editor of The Western Socialist in this period. When Wicks was replaced by a member of the local Foundry Workers' Union as President of the Council, he left the group, which expired after approximately 6 months of existence.

Wicks was a delegate to Founding Convention of Communist Party of America and on the 9 member committee which wrote the CPA Program in 1919. The founding convention elected Wicks to the Central Executive Committee of the CPA, which in turn elected him to its governing inner circle, the Executive Council. Wicks was the only member of the Michigan tendency to accept office in the new CPA. He also served as Associate Editor of the party's official organ, The Communist. Wicks was jailed in Nov. 1919 in connection with these activities as part of the Justice Department's crackdown on members of the Communist Party.

In 1920, Wicks rejoined his Michigan comrades when he became a member of the Proletarian Party of America, serving on the governing National Executive Committee of that organization. Wicks was the fraternal delegate of the PPA to the founding convention of the Workers Party of America in Dec. 1921, but he came as a foe rather than a friend, engaging in a bitter criticism of that organization. After the Proletarian Party's decision to support the legal arm of the Central Caucus faction's "Communist Party of America" in 1922, Wicks was named as the editor of the organ of this "United Toilers of America," The Workers' Challenge. This publication was later recalled as home to "the most violent and vituperative polemics in America," provoking one Communist Party wag to refer to their rivals as the "United Toilets."

The bitterness between Wicks' organization and the Communist Party proved short-lived, however. Along with most of his United Toilers comrades, Harry Wicks joined the Workers Party of America following the liquidation of the Central Caucus split in the summer of 1922. The hatchet was quickly buried. Harry Wicks was named to the governing Central Executive Committee of the WPA by the party's December 1922 convention, as well as to the 11 man "Executive Council" which handled day-to-day operations of the party. He was also named to the editorial board of the party's weekly newspaper The Worker at that time. He also delivered the report on the printing trades to the first annual convention of William Z. Foster's Trade Union Educational League in August 1922.