Stephen Watts Kearny (surname also appears as Kearney in some historic sources; August 30, 1794 – October 31, 1848), is one of the foremost antebellum frontier officers of the United States Army.

He is remembered for his significant contributions in the Mexican–American War, especially the conquest of California.

The Kearny code, which seeks to regulate government behavior toward Californios, is named after him.