In October 2020, a group of Oregon Coordinated Care Organizations (CCOs), health systems, and other organizations, seeking to enable care coordination across health care and social service providers, launched the Connect Oregon referral system. With Unite Us as the technology backbone, Connect Oregon enables participating organizations to make secure, closed-loop electronic referrals to each other and to communicate about the outcomes of those referrals for clients who have consented to share their information within the platform. Over the past three years, Connect Oregon has expanded across the state: Connect Oregon was available in 19 counties in 2021, in 35 counties in 2022, and in all 36 Oregon counties by early 2023. These reports examine the implementation of Connect Oregon in its first 3 years of operation and identify how to continue to advance adoption of the platform.