Structural and magnetic properties of Sc-substituted cobalt ferrites were studied by X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, and vibrating-sample magnetometry. The ScxCoFe2-xO4 (x ≤ 0.3) specimens prepared as thin films by a sol-gel deposition method were polycrystalline having cubic spinel structure with a small increase in the lattice constant compared to CoFe2O4. The Raman spectral analyses suggested that the Sc-doped specimens have higher tetrahedral Co2+ population than that of pristine CoFe2O4. The magnetic hysteresis curves of the ScxCoFe2-xO4 specimens indicated that the saturation and remanent magnetization decrease proportionally with the increase of Sc composition (x). The decrease in the ferrimagnetic parameters is understandable in terms of the octahedral substitution of non-magnetic Sc3+ ions. However, the octahedral Sc3+ ions caused an increase of the coercivity.