Louis Bailey Lowdermilk (February 23, 1887 – December 27, 1975), was an American politician and a Major League Baseball pitcher who played in 1911 and 1912 with the St. Louis Cardinals.

He was born in Sandborn, Indiana, and died in Centralia, Illinois.

He was the brother of Grover Lowdermilk, who also played in Major League Baseball.

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