Microwave ceramic dielectric resonators (DRs) based on RE-TiNbO6 (RE = Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Y, and Yb) have been prepared using the conventional solid-state ceramic route. The DR samples are characterized using XRD and SEM methods. The microwave dielectric properties are measured using resonant methods and a net work analyzer. The ceramics based on Ce, Pr, Nd, and Sm have dielectric constants in the range 32-54 and positive coefficient of thermal variation of resonant frequency (tau (f)). The ceramics based on Gd, Tb, Dy, Y, and Yb have dielectric constants in the range 19-22 and negative tau (f).