Potential application of the impingement jet technique in various situations has gained the attention of researchers in recent times for its large heat transfer rate characteristics. In the present study, the heat transfer and flow characteristics of a heat sink having rectangular fins and optimized for impingement jet by making use of Taguchi experimental L18(2^1*3^7) design method were experimentally and numerically analyzed. The heat transfer and flow characteristics of a heat sink with rectangular fins and optimized for impingement jet cooling were experimentally and numerically analyzed by making use of 6 different jet speeds (4, 5, 6, 7, 8, and 9 m/s), 4 different nozzle diameters (D=40, 50, 63, and 75 mm), and 3 different nozzle-to-target distances (h/d=1, 2, and 3). The changes in average target surface temperature were measured and the Nusselt numbers were calculated, as well as the changes in the Reynolds number. These results were also simulated numerically by making use of the ANSYS Fluent software. To compare the results to the experimental research, the k-ε realizable turbulence model was selected to be the most suitable model. Experimental and numerical results were compared using Nu-Re diagrams. The numerical results show that the average Nusselt number is directly proportional to the increase in Reynolds number. The Nusselt number was also found to decrease with an increase in the distance between nozzle and heat sink. The peak value of local Nusselt number was found to be the stagnation point. It was determined that experimental and numerical findings were consistent.