In this article, the X‐band low‐phase noise oscillator based on a μ‐near zero (MNZ) metamaterial resonator is presented. The MNZ resonator has small size and high loaded quality factor (QL) and the oscillator has low‐phase noise due to high‐QL. Also, the proposed resonator is composed of complimentary structure which consists of spur‐line and meander‐line. The measured QL of a new resonator is 213 at resonant frequency of 10 GHz and the output power and second harmonics suppression are 14.43 dBm and −30.65 dBc, respectively. The measurement result for phase noise is −101.71 dBc/Hz at 100 kHz offset.