Magnetic resonance imaging systems having gradient coil assemblies employing a liquid dielectric medium are provided. In one embodiment, a magnetic resonance imaging system (10) includes a gradient coil assembly (58, 60) with a plurality of gradient coils (26, 28, 30). In the gradient coil assembly (58, 60), at least two of the gradient coils (26, 28, 30) are electrically separated from one another by a fluid medium.