The magnetic properties of MgZn 2-type Zr(Cr 1 - xFe x) 2 (0.3 ⩽ x ⩽ 0.7) and Zr(Cr 1 - xFe x) 2H y ( y ∼ 3) alloys have been investigated. Arrott plots showed no evidence for ferromagnetic ordering. ZFC/FC magnetization and Mössbauer spectroscopic data indicated spin glass-like freezing. Saturation moments in the unhydrided alloys decreased with decreasing Fe concentration, vanishing for x ≈ 0.3. Hydrogen absorption made magnetic moments increase and freezing temperatures decrease.