The paper basically examines the interface between constitution and public policy in a state. Constitution is the supreme legal directive instrument in every democratic country. It provides the various fundamental rights to its citizens and contains the provisions in relation to policy matters as well as power relationships between different organs of the state. In fact, it designs institutional terms and conditions of living, the fundamental principles of governance, the guidelines of ensuring transparency in the affairs of governance and the policy prescriptions in matters of all development interventions of the government and citizen bodies. The fundamental principles of state policy on various substantive areas are laid down in articles of the constitution. Policy direction enabling the policy makers to set programs, projected objectives, and societal goals for the gratification of common interests stems from the constitution. To put it squarely, there is a clear correlation between constitution and the contents of public policy. This paper elaborates how constitutional provisions influence the different kind of policies in a country. It also highlights that the constitutional direction of assigning policy responsibilities enables the government to implement public policy in accordance with institutionally designed sets of rules, regulations, acts and statutes.