Charles Augustus Aiken (October 30, 1827 – January 14, 1892) was an American clergyman and academic.

[1] He married Sarah Noyes on October 17, 1854, and was ordained a pastor of the Congregational church in Yarmouth, Maine, that same year.

He became president of Union College June 28, 1870, having discharged the duties of the office during the preceding year.

[1] He left that position in 1871, to become the first Archibald Alexander professor of Christian ethics and apologetics at Princeton Theological Seminary, which he remained in that position until his death.

In 1870, he translated and edited The Proverbs of Solomon Theologically and Homiletically Expounded he was also an editor of the Princeton Review, and a contributor to other periodicals.