Thin films and nanowires of FeO have potentiostatically been electrodeposited on ITO coated glass and employing templates in a conventional three-electrode cell using two different baths. Appropriate potential windows, suitable for films and nanowires, were estimated from cyclic voltametry. Structural property of FeO films was studied by X-ray diffraction. A large (−3.35%, at 2.3 kOe) longitudinal magnetoresistance (MR) was observed at room temperature, and the shape of MR curves showed a reduced hysteresis loop for FeO films with low coercivity. Room-temperature magnetic properties of FeO films were studied by vibrating sample magnetometer (VSM). Surface morphology of nanowires was studied by scanning electron microscope (SEM). The nonlinear I- V characteristic of nanowires was observed at room temperature. An attempt has been made to understand the conduction mechanism. [ABSTRACT FROM AUTHOR]