Charles O'Neill (March 21, 1821 – November 25, 1893) was an American politician from Pennsylvania who served as a Republican member of the U.S. House of Representatives for Pennsylvania's 2nd congressional district from 1863 to 1871 and from 1873 to 1893.

O'Neill was born in Philadelphia, Pennsylvania and attended a Quaker preparatory school.

He studied law under the future Vice-President of the United States, George M. Dallas and was admitted to the Philadelphia bar in 1843.

[1] He was elected as a Whig[1] to the Pennsylvania House of Representatives and served from 1850 to 1852 and from 1860 to 1861.

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