What follows is an an organized and curated list of content. Click here for an exhaustive list of content on Zephaniah
Homer Heater Jr.: 11. Zephaniah  Part of a series on the Old Testament prophets. History, Background, Extensive paragraph outline.
Kenneth Boa: 44. Zephaniah  Part of the series: Visual Survey of the Bible.
Bill McRae: 30. Zephaniah and Haggai  Part of the series: Survey of the Bible.
Bob Deffinbaugh: 42. The Book of Zephaniah  Part of the series: Creation to the Cross.
Mark Dever: What’s There to be Thankful For? – The Message of Zephaniah  Capitol Hill Baptist Church.
Ray Stedman: What’s There to be Thankful For? – The Message of Zephaniah [, Translated] Part of the series: Adventuring Through the Bible. Peninsula Bible Church. Spanish Translation available.
Michael Lawrence: Coming Soon. . . .  3 lessons. Capitol Hill Baptist Church.
John Piper: The Lord Will Rejoice over You [, ] lesson 1.
Richard D. Patterson: 3. Zephaniah Part of the series: An Exegetical Commentary - Nahum, Habakkuk, Zephaniah.
Study Helps and related
Tom Constable: Tom Constable’s Expository Notes on Zephaniah  This is also available in the Net.Bible.org Study Environment.
David Malick: An Introduction to the Book of Zephaniah 
J. Hampton Keathley, III: 7. The Minor Prophets  Part of the series: Concise Old Testament Survey.
Hampton Keathley IV: 9. Zephaniah Part of the series: The Minor Prophets.