This study explores the dynamic response and vibration control of monopile-supported systems under lateral dynamic loads, incorporating advanced modeling and experimental techniques. Initially, the dynamic impedance properties of a monopile placed within in homogeneous and soil/ soil and rock layered conditions are developed using a spectral element formulation. The results reveal that the presence of a rock layer significantly enhances system stiffness, while increasing rock-socketing depth reduces horizontal amplitudes but increases resonant rocking amplitudes. Incorporating resonator-based vibration control, a novel approach is proposed to integrate periodically linked spring-mass resonators along the monopile, forming a “metapile.” Analytical results show that resonators effectively attenuate vibrations within specific frequency ranges, while lumped masses broaden the frequency response range. For wind turbine systems, four configurations are examined: conventional, resonators in the tower, monopile, and both. Experimental tests on a scaled model validate the analytical predictions, highlighting substantial vibration reduction in configurations with resonators, particularly when placed in both tower and monopile. This research underscores the efficacy of resonators in enhancing dynamic performance, demonstrating their potential for reducing vibrations in monopile-supported structures under varied soil-rock conditions, with implications for onshore wind turbine design.