<p>BaFe₁₂O₁₉ and NiFe₂O₄ ferrite powders were synthesized separately using the sol gel auto-combustion method, and physically mixed in various weight ratios (100:0, 50:55, 40:60, 20:80, 0:100). The nanocomposites were heated at 1000 °C and characterized using XRD, SEM, VSM, and dielectric techniques. XRD analysis confirmed the presence of both hexagonal (BaFe₁₂O₁₉) and cubic (NiFe₂O₄) phases in the prepared nanocomposites. SEM micrographs revealed notable changes in the grain morphology and grain size with increasing nickel ferrite content. Magnetic hysteresis studies indicated that all BaFe₁₂O₁₉/NiFe₂O₄ nanocomposites exhibit multi-domain nature as reflected by the squareness ratio (&lt;0.5). The coercivity varied from 0.0216 T to 0.0813 T, while saturation magnetization varied between 27.3 Am²/kg to 38.2 Am²/kg. The nanocomposite containing the equal proportion (50%) of BaFe₁₂O₁₉ and NiFe₂O₄ exhibited the highest dielectric constant (ε' = 60 at 100 Hz). Typical ferrite behavior was observed in the frequency-dependent AC conductivity, dielectric constant, dielectric loss, electric modulus, and impedance responses. The 50% nanocomposite shows a single semi-circular arc in the higher frequency region, where other nanocomposites show double arcs at lower and higher frequency regions.</p> Graphical Abstract <p></p>