There is no Allstate Legal office in New Jersey. Allstate's legal department is headquartered at its corporate campus in the Chicago suburbs:
Allstate LegalAllstate Insurance does have claims offices, agent locations, and service centers throughout New Jersey — but legal operations (corporate counsel, litigation, compliance, regulatory) are centralized in Illinois.
If you need to serve legal process on Allstate in NJ, use their registered agent (typically CT Corporation or similar) — not a local legal office. For customer legal inquiries, contact Allstate's main consumer line or your agent.