Multilateralism in counterterrorism refers to global efforts led by United States of America, its allies, and international organization, to prevent, combat, and to respond to global terrorism. This study seek to examine the various dimensions of multilateralism taken by Kenya-United States of America partnership on counterterrorism. The study was informed by the two leading theories of international relation; realism and liberalism to complement each other. The study adopted a qualitative approach by utilizing existing literature and primary data collected with interview schedule. The study found out that the multilateral dimension taken by Kenya-US are; coalition, charter, and club. The study concludes that the future of counterterrorism efforts lies on multilateralism. The study recommends that for counterterrorism efforts to succeed there is need for stronger collaboration among states and non-state actors working together to ameliorate factors which may lead to rise of extremists and violent groups.