Johannes zu Eltz (born 2 October 1957) is a German Catholic priest, who has served as Dean of Frankfurt, and a member of the cathedral chapter of the Diocese of Limburg.

The son of Jakob zu Eltz and his wife Ladislaja née Mayr von Melnhof [de], he grew up with eight siblings on a winery in the Rheingau.

[3] From 1999 to 2010, he was also judge at Limburg Church Court of the Diocese, and was its Offizial, especially concerned with marital cases.

[3] In January 2018, Eltz spoke up for the blessing of same-sex unions also in the Catholic church, as done before only by Bishop Franz-Josef Bode of the Diocese Osnabrück.

[8] In 2019, he signed the open letter to Cardinal Reinhard Marx, demanding a new approach to sexual ethics in the Catholic church, especially regarding understanding of same-sex relationships ("Neustart mit der Sexualmoral", "verständige und gerechte Bewertung von Homosexualität"), first published in the Frankfurter Allgemeine Zeitung on 3 February 2019.