Born and raised in Suicide Slum, she moved with her family to Chicago, and became a lawyer. In Star City, she was the lead attorney for the Lamb Valley Tenants Association. She befriended Oliver Queen when he takes the initiative to be charitable, but getting to close to him leads to her death. Her death drives a wedge between Oliver and her uncle Jefferson Pierce.
- 8 Appearances of Joanna Tanner (New Earth)
- 1 Images featuring Joanna Tanner (New Earth)
- Quotations by or about Joanna Tanner (New Earth)
- Character Gallery: Joanna Tanner (New Earth)