The cobalt ferrite nanoparticles (CoFeFeO) were synthesized by the surfactant templated co-precipitation method using various surfactants namely sodium dodecyl sulfate (SDS), hexadecyltrimethylammonium bromide (CTAB), and Tween20. Under the substitution, the CoFeFeO particles were synthesized at various Co and Fe mole ratios (x = 1, 0.6, 0.2, and 0) with the SDS. The cobalt ferrite nanoparticles were characterized for their morphology, structure, magnetic, and electrical properties. All CoFeFeO nanoparticles showed the nanoparticle sizes varying from 16 to 43 nm. In the synthesis of CoFeO, the SDS template provided the smallest particle size, whereas the saturated magnetization (M) of CoFeO was reduced by using CTAB, SDS, and Tween20. For the CoFeFeO as synthesized by the SDS template at 1.2 CMC, the M increased with increasing Fe mole ratio. The highest M of 100.4 emu/g was obtained from the FeO using the SDS template. The FeO nanoparticle is potential to be used in various actuator and biomedical devices.