Barium hexaferrite (BaFe₁₂O₁₉; M-type; BaM) is an important, cost effective magnetic material for permanent magnet applications. The magnetic properties of the prepared samples, and the purity of the BaMphasedepend critically on the synthesis route and experimental conditions. In this study, BaM hexaferrites were preparedby co-precipitation method using two different values of pH for the precursor solutions (11.0 and 12.5), and sintering pellets of the co-precipitates at 860, 920 and 990 °C.The prepared samples were characterized using X-ray diffraction and magnetic measurements. X-ray diffraction patterns indicated that thesamplesprepared with pH = 12.5 consisted of a single BaM phase at all sintering temperatures. However,the patterns of thesamples with pH = 11.0 did not reveal the existenceof BaM at 860 °C, whereasa major BaM phase (86 – 87 wt.%) was observedat 920 and 990 °C with a minor α-Fe₂O₃ phase. The thermomagnetic curves confirmed the BaM magnetic phase in the samples. The hysteresis loops of the BaM samples showed characteristics of hard magnetic materials with relatively high saturation magnetization. Analysis of the magnetic data indicated an intrinsic coercivity H_ci~ 5 kOe for all samples, and a saturation specific magnetization in the range σ_s = 56.0 – 66.3 emu/g, which are suitable for permanent magnet applications. The practical coercivity (H_cB), residual induction (B_r) and maximum energy product (BH)_max of the samples with pH = 12.5 are higher than those of the samples with pH = 11.0, and the highest magnetic parameters of H_cB = 1871 Oe, B_r = 2384 G, and (BH)_max = 8.92 kJ/m³ were observed for the sample with pH = 12.5 and sintered at 860 °C.