Zinc ferrite (ZnFe2O4) hollow fibers have been fabricated by annealing electrospun polyvinylpyrrolidone (PVP)/nitrate salt composite nanofibers at 500 degrees C for 3 h with a heating rate of 5 degrees C . min(-1). The composite fibers were initially prepared by electrospinning Zn, Fe salts, and PVP from solution. The structure, morphology, and magnetic properties were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and vibrating sample magnetometry (VSM). The XRD results indicate a spinel phase structure, while SEM and TEM reveal hollow fibers (200-400 nm in diameter) with walls consisting of packed 25 nm nanoparticles. Room temperature VSM of the ZnFe2O4 hollow fibers reveal a superparamagnetic behavior and a magnetization value of 2.03 emu . g(-1) at 10 kOe.