This paper examines the emergence and role of research think tanks in Israel, particularly with regard to their influence on policy-making. The establishment of the first think tanks coincided with the founding of the state, with their numbers increasing since the 1990s. This paper attempts to map these Israeli think tanks, which are classified under four categories: government, private or independent think tanks, political party think tanks, and academic think tanks (‘universities without students’). The paper is divided into two themes. The first considers the core issues of their interest against the existence of these think tanks in the Israeli parliamentary political system. The second applies both the quantitative and the qualitative features of these think tanks in an attempt to discover the extent of their influence within the process of decision-making in Israel.