What did the U.S. Advisory Commission on Intergovernmental Relations (ACIR) accomplish before it was disbanded in 1996? Were its accomplishments sufficiently valuable to justify reestablishing the organization? This article reviews the commission’s origins, history, and accomplishments, and addresses future intergovernmental needs. The ACIR’s accomplishments were substantial, but are largely unavailable today. Lessons learned from the ACIR suggest the need to (1) recreate a network of intergovernmental advocates within the legislative and executive branches of the federal government; (2) restart the information flows and high-level federal, state, and local policy dialogues that withered after the ACIR’s demise; (3) strengthen boundary-crossing institutions capable of addressing metropolitan and multistate problems; and (4) develop new opportunities to achieve public policy outcomes that can be attained only by the cumulative efforts of federal, state, and local governments working together—often with private parties as well.