Charles Augustus May (1818–1864) was an American officer of the United States Army who served in the Mexican War and other campaigns over a 25-year career. He is best known for successfully leading a cavalry charge against Mexican artillery at the Battle of Resaca de la Palma.

The Battle of Resaca de la Palma was one of the early engagements of the Mexican–American War, where the United States Army under General Zachary Taylor engaged the retreating forces of the Mexican Ejército del Norte under General Mariano Arista on May 9, 1846. The United States emerged victorious and forced the Mexicans out of Texas.