The focus of this paper is on the impedance-based fault location in a transmission line via synchronized phasor measurements. Physical and mathematical modeling involving real-time digital simulations is used to show that fault location based on synchronized phasor measurements is promising for extra-high voltage overhead transmission lines. Avariety of single-end and double-end fault location methods are put together to show that the fault location accuracy can be well within 1 – 2% for both P and M class filters defined in the IEEE C37.118 standard. The methods are analyzed for a validated 750 kV line model generated using ATPDraw software and an electric grid model with 500, 330, and 220 kV overhead lines sharing the same right-of-way. Unlike many other publications, no Fourier-simulated phasors under transients are used here. Instead, we resort to physical modeling involving hardware equipped with synchrophasor functionality. An experimental setup is described, and future research areas are highlighted.