<p>Manganese doped in A/B bismuth ferrites (BiFe_(1-<i>x</i>)Mn_<i>x</i>O₃ and Bi_(1-<i>x</i>)Mn_<i>x</i>FeO₃, where <i>x</i> = 0.05 and0.1) were synthesized using the sol-gel autocombustion process. X-ray diffraction showed the formation of a perovskite phase with rhombohedrally deformed structures and the <i>R3c</i> space group.Clear peak shifts with marked crystallite size variations were seen with changing Mn content at the A/B sites. Morphology evaluations employing scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) revealed well-formed, homogeneous grains containing all constituent elements used in the sample synthesis.Room temperature dielectric tests confirmed the behavior of space charge polarization at the studied frequencies, with very low loss tangent values observed, particularly in the BiFe_(1-<i>x</i>)Mn_<i>x</i>O₃ series. Nyquist plots confirm the origin of different conduction mechanisms in both series by showing typical hopping mechanisms. Magnetic studies show considerably enhanced magnetic parameters in BiFe_(1-x)Mn_xO₃ (for <i>x</i> = 0.1, saturation magnetization: 2.302 emu/gm; coercivity:183.6 Oe) series compared to Bi_(1-x)Mn_xFeO₃ (for <i>x</i> = 0.1, saturation magnetization:0.454 emu/gm; coercivity: 380.9 Oe). The impact of Mn in the BFO lattice onthe structural, morphological, dielectric, impedance and magnetic properties are discussed.</p> Graphical Abstract <p></p>