Fly ash is produced from the combustion of coal at power plants. Fly ash is fine-grained, well-rounded, cohesionless, and possesses a specific gravity of around 2.2. Fly ash is often placed hydraulically in fills in a loose, nearly saturated state. Therefore, it is highly susceptible to liquefaction, and it is very important to accurately estimate its dynamic properties when assessing the behavior of fly ash fills under dynamic loading. Herein, laboratory measurements of the dynamic properties of class F fly ash were performed on reconstituted specimens using the free-free resonant column method. These results indicate that the shear wave velocity of fly ash is typically around 110-150 m/s, and increases with increasing confining stress. Material damping of fly ash typically ranges from 2-5. These results can be used to estimate the dynamic properties of fly ash for performing site response analyses on fly ash deposits.