Various concentration of manganese metal ions (x = 0.01, 0.02, 0.03, 0.04, 0.05 mol%) doped Sodium Magnesium Phosphate (SMP) NaMg4(PO4)3 compounds were made through combustion-reaction method. The powder X-ray diffraction (XRD) pattern confirms that Mn2+ ions were incorporated into the NaMg4(PO4)3 host lattice forming a complete solid solution. Elemental analysis and surface morphology were examined from the EDX spectrum and corresponding element mapping by scanning electron microscopy. The Photoluminescence spectra of Mn-doped SMP samples exhibited a strong visible emission peak at the wavelength of 617 nm, which indicated that spinforbidden transition takes place from 4T1g (G) to 6A1g (S) with inversion symmetry. The photoluminescence profiles exhibited the quenching in emission intensity above 0.03 mol% of Mn(NO3)2 due to the availability of more octahedral Mn2+ ions. These outputs show that Mn2+ activated NaMg4(PO4)3 material can fulfill application in redemitting phosphor-based LEDs devices.