Jeremiah 20 is the twentieth chapter of the Book of Jeremiah in the Hebrew Bible or the Old Testament of the Christian Bible. This book contains prophecies attributed to the prophet Jeremiah, and is one of the Books of the Prophets. This chapter includes the fifth of the passages known as the "Confessions of Jeremiah".

Jeremiah, also called Jeremias or the "weeping prophet", was one of the major prophets of the Hebrew Bible. According to Jewish tradition, Jeremiah authored the book that bears his name, the Books of Kings and the Book of Lamentations, with the assistance and under the editorship of Baruch ben Neriah, his scribe and disciple.