The South Korea–United States alliance has evolved from one focused solely on the security of South Korea to a partnership that encompasses a broad array of issues of mutual concern. Described in the 2013 Joint Vision Statement, the Alliance seeks to cooperate on issues such as climate change, piracy, trafficking, and WMD proliferation. However, several hurdles remain, including possible disagreement over a common policy on dealing with North Korea, defense burden sharing, latent anti-Americanism, the KORUS FTA, and the friction associated with South Korea begin caught in the middle of China–United States relations. The alliance remains on relatively solid ground, but maintaining the relationship will require regular attention and dialogue. Serious challenges loom on the horizon that will test leaders in both countries, and working together in a collaborative relationship will be essential to successfully navigate the rough waters that lay ahead. This chapter reviews the future of the alliance and makes some concluding remarks about the evolving nature of the alliance.