The US-ASEAN relationship was officially established in 1977 and has since experienced many memorable milestones: ASEAN and the US established an Enhanced Partnership in 2005; in 2010, the US established a permanent representative mission to ASEAN; in 2015, ASEAN and the US built a strategic partnership; and in November 2022, ASEAN and the US upgraded to a comprehensive strategic partnership. This is creating beneficial changes for both the US and ASEAN. For the US, it means maintaining its position in the region. In contrast, for ASEAN, it means ensuring peace and security in the area and increasing its standing on the international stage. This article will outline strategic shifts in US-ASEAN relations, examine recent steps to strengthen them under President Joe Biden's administration (2021-2025), and offer observations on practical cooperation to maintain the stability and prosperity of countries in the region..