Following her parents' divorce, she took her mother's maiden name.
Born and raised in Suicide Slum, Joanna moved with her family to Chicago and became a lawyer. In Star City, she became the lead attorney for the Lamb Valley Tenants Association. Joanna befriended Oliver Queen when he took the initiative to be charitable, but getting too close to him led to her death. Joanna's death drove a wedge between Oliver and her uncle, Jefferson Pierce.
- 8 Appearances of Joanna Tanner (New Earth)
- 2 Images featuring Joanna Tanner (New Earth)
- Quotations by or about Joanna Tanner (New Earth)
- Character Gallery: Joanna Tanner (New Earth)