John Nicholas Galleher (February 17, 1839 – December 7, 1891) was third bishop of the Episcopal Diocese of Louisiana from 1880 to 1891.

He received his early education at Maysville, Kentucky and attended the University of Virginia from 1856 and 1858.

Galleher was ordained a deacon on June 7, 1868, in Christ Church Cathedral in Louisville, Kentucky by Bishop George David Cummins.

[1] Galleher was elected Bishop of Louisiana and consecrated on February 5, 1880, by Bishop William Mercer Green of Mississippi, and co-consecrated by Richard Hooker Wilmer of Alabama, Charles Franklin Robertson of Missouri and Thomas Underwood Dudley of Kentucky.

In: Episcopate in America - Sketches Biographical & Bibliographical of the Bishops of the American Church.