The convergence of quantum computing capabilities and sophisticated cyber threats poses unprecedented challenges to the security posture of United States critical infrastructure. Traditional perimeter-based security models are increasingly inadequate against quantum-enabled attacks that can compromise current cryptographic foundations. This paper presents a comprehensive framework for migrating critical infrastructure to quantum-resilient zero-trust architectures, addressing the unique challenges faced by sixteen critical infrastructure sectors as defined by the Cybersecurity and Infrastructure Security Agency (CISA). Through analysis of current threat landscapes, examination of postquantum cryptographic implementations, and development of sector-specific migration strategies, this research provides actionable guidance for infrastructure operators, policymakers, and security professionals preparing for the quantum era.