John Powell Irish (1843–1923) was a leader of the Democratic Party in Iowa, US, a landowner in the Sacramento-San Joaquin Delta region of California, a fiery and influential public speaker, and an opponent of prejudice against Japanese, the Chinese Exclusion Act of 1882, women's suffrage and labor unions. He was, according to US Interior Secretary Franklin K. Lane, "a fiery orator of the denunciatory type." He was reckoned as "a leader among editorial writers" of his generation.