A novel low-frequency wideband and polarization-insensitive metameterial ab- sorber is presented. It is composed of multiple dielectric slabs, lumped resistors, square-circular rings and a metal ground plane, with suitable air spacers sandwiched. An absorptive operat- ing band, determined by absorption A = 1 − |S11 |2 − |S21 |2 > 90%, is demonstrated in the frequency range of 1.96 GHz to 7.44 GHz numerically, up to a bandwidth of 116.6%. The wide- band absorption design is based on the destructive interference of the reflection waves from the metamaterial and the magnetic resonance of the square-circular loops. The total thickness of the designed absorber is only 0.094λL , where λL is the free-space wavelength at the lowest operating frequency.