<b>Load Frequency Control of Three Area Power System using Fuzzy Logic Controller</b> This paper proposes a method to determine the magnitude and location of load disturbances in multi area power systems via monitoring tie line power flows, implementing demand response regionally. In this work, proposes an intelligent coordination between secondary control and demand response through a supervisory fuzzy PI based coordinator. The simulations were performed in the environment of MATLAB SIMULINK. Multi Area Power System, Load Frequency Control, fuzzy PI based coordinator 28-32 Issue-2 Volume-4 K. Sumanth Kumar | S. Thirumalaiah