Zondervan: Founded in 1931, Zondervan is one of the largest Christian publishers in the world. They are known for publishing Bibles, Christian books, and study materials.
Thomas Nelson: Founded in 1798, Thomas Nelson is one of the oldest Christian publishers in the world. They are known for publishing Bibles, Christian books, and study materials.
HarperCollins Christian Publishing: HarperCollins Christian Publishing is a division of HarperCollins Publishers, one of the largest publishing companies in the world. They are known for publishing Christian books, Bibles, and study materials.
Tyndale House Publishers: Founded in 1962, Tyndale House Publishers is known for publishing Christian books, Bibles, and study materials.
Baker Publishing Group: Founded in 1939, Baker Publishing Group is known for publishing Christian books, Bibles, and study materials.
InterVarsity Press: Founded in 1947, InterVarsity Press is known for publishing Christian books, Bibles, and study materials.
Crossway: Founded in 1938, Crossway is known for publishing Christian books, Bibles, and study materials.
Multnomah Publishers: Founded in 1984, Multnomah Publishers is known for publishing Christian books, Bibles, and study materials.
Bethany House Publishers: Founded in 1971, Bethany House Publishers is known for publishing Christian books, Bibles, and study materials.
Moody Publishers: Founded in 1894, Moody Publishers is known for publishing Christian books, Bibles, and study materials.
David C Cook: Founded in 1875, David C Cook is a Christian publisher that provides resources to help people grow in their faith and share it with others.
Oxford University Press: Founded in 1478, Oxford University Press is a reputable publisher that also has a religious division that publishes academic and scholarly work, such as theology, biblical studies, church history, and religious ethics.
Wm. B. Eerdmans Publishing Co: Founded in 1911, Wm. B. Eerdmans Publishing Co is known for its theology, biblical studies, and religious history books.
Fortress Press: Founded in 1972, Fortress Press is a publisher that is focused on theology, biblical studies, and religious history.
SPCK Publishing: Founded in 1698, SPCK Publishing is one of the oldest Christian publishers in the world. They are known for publishing Christian books, Bibles, and study materials.
It's worth noting that this is a non-exhaustive list and there are many other Christian publishers around the world that are also making significant contributions to the industry.