Pr 3+-doped Ni–Zn ferrites with a nominal composition of Ni 0.5Zn 0.5Pr x Fe 2− x O 4 (where x=0–0.08) were prepared by a one-step synthesis. The magnetic and dielectric properties of the as-prepared Ni–Zn ferrites were investigated. X-ray diffraction data indicated that, after doping, all samples consisted of the main spinel phase in combination of a small amount of a foreign PrFeO 3 phase. The lattice constants of the ferrites initially increased after Pr 3+ doping, but then became smaller with additional Pr 3+ doping. The addition of Pr 3+ resulted in a reduction of grain size and an increase of density and densification of the as-prepared samples. Magnetic measurement revealed that the saturation magnetization of the as-prepared ferrites, M s , decreased, while the coercivity, H c , increased with increasing substitution level, x, and the Curie temperature, T c , kept a rather high value, fluctuating between 308 and 320 °C. Both the real and imaginary parts of permeability of the ferrites decreased slightly after Pr 3+ doping. However, the natural resonance frequency shifted towards higher frequency from 13.07 to 36.17 MHz after the addition of Pr 3+, driving the magnetic permeability to much higher frequency, reaching the highest value (36.17 MHz) when x=0.04. Introduction of Pr 3+ ions into the Ni–Zn ferrite reduced the values of the dielectric loss tangent, especially in the frequency range of 1–400 MHz. However, the magnitude of dielectric loss of the samples doped with different amounts of Pr 3+ raised little.