Nelson B. McCormick (November 20, 1847 – April 10, 1914) was a U.S. Representative from Kansas.

Born near Waynesburg, Pennsylvania, Mccormick attended the common schools. He moved to Marion County, Iowa, in 1867, where he engaged in farming and stock raising until his removal to Phillips County, Kansas, where he settled upon a homestead in 1877. He studied law. He was admitted to the bar in 1882 and commenced practice in Phillipsburg, Kansas. Deputy prosecuting attorney of Phillips County 1886–1888. He served as prosecuting attorney 1890–1894. He declined to be a candidate for renomination.

McCormick was elected as a Populist to the Fifty-fifth Congress (March 4, 1897 – March 3, 1899). He was an unsuccessful candidate for reelection in 1898 to the Fifty-sixth Congress. He resumed the practice of law in Phillipsburg. He served as delegate to the Democratic State conventions in 1904 and 1908. He served as prosecuting attorney of Phillips County 1910–1914. He died in Phillipsburg, Kansas on April 10, 1914. He was interred in Fairview Cemetery.

• United States Congress. "Nelson B. McCormick (id: M000370)". Biographical Directory of the United States Congress.

 This article incorporates public domain material from the Biographical Directory of the United States Congress