Cyrus Frederick Knight (March 28, 1831 – June 8, 1891) was the fourth Bishop of Milwaukee from 1889 till 1891.

[1] Knight was ordained deacon on July 2, 1854, in Trinity Church, New York City, by the Bishop of New York Jonathan Mayhew Wainwright, and became assistant at St Luke's Church in Germantown, Philadelphia.

He then travelled to England, attending several courses of lectures at the University of Oxford.

In 1878, he became rector of St James's Church in Lancaster, Pennsylvania, a post he retained till 1889.

Knight's primary consecrators were: He died two years later, in Milwaukee, on June 8, 1891.