Joseph Deharbe (11 April 1800 at Strasbourg, Alsace – 8 November 1871 at Maria-Laach) was a French Jesuit theologian and catechist.
He entered the Society of Jesus in 1817 and after teaching for eleven years at the Jesuit College at Brieg, Switzerland, he became in 1840 a missionary and catechist in Köthen, Germany.
As a catechist in Köthen he felt the lack of a good catechism, and was encouraged by his superior, Johann Baptist Devis, to compose one.
It was translated in 1851 into Magyar, then into Bohemian, Italian, and French; into Swedish and Marathi, 1861; into Polish and Lithuanian, 1862; into Slovenian, 1868; into Danish, 1869; and later into Spanish and Portuguese.
Deharbe himself prepared and published at Ratisbon four extracts of his first work, titled He preserved catechetical tradition but abandoned the division of Peter Canisius, arranging the text-matter under chapters on Faith, Commandments, and Means of Grace.