John Krepps Miller (May 25, 1819 – August 11, 1863) was an American lawyer and politician who served as a two-term U.S. Representative from Ohio from 1847 to 1851.

Born in Mount Vernon, Ohio, Miller attended the public schools. He graduated from Jefferson College, Canonsburg, Pennsylvania (now Washington & Jefferson College, in 1838. He studied law and was admitted to the bar in 1841. He then commenced practice in Mount Vernon, Ohio.

He served as delegate to the Democratic National Convention in 1844.

Miller was elected as a Democrat to the Thirtieth and Thirty-first Congresses (March 4, 1847 – March 3, 1851).

He died in Mount Vernon, Ohio, on August 11, 1863. He was interred in Mound View Cemetery.

• United States Congress. "John K. Miller (id: M000742)". Biographical Directory of the United States Congress.

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