The study investigated the relationship between inter annual rainfall variability and crop yield in Nasarawa State. Only the secondary sources of data were employed for the study. Data on crop yield was collected from the archives of Nasarawa Agricultural Development Program (NADP), this include crop yield data in metric tons from 1998 to 2015. While the rainfall data was collected from a remote sensing package of Tropical Rainfall measuring mission (TRMM) which covers the entire state. Daily rainfall records of each point or Local government Area was recorded in millimeters from 1998 to 2015. A simple regression analysis was adopted to analyze the relationship of rainfall against crop yield in Nasarawa State. The result was presented for each agricultural zone in the State i.e North, South and West. The result shows that rainfall has no significant influence on both yam, Maize and Rice in all agricultural zone in the state. The results show that crop farming is not under any threat from drought thus high yield is guaranty.
Key Words: Regression, Yam, Maize, Rice, Inter annual rainfall