The asymmetric unit of the title compound, [Co(NH(3))(6)][Mn(CN)(6)], contains one Co and one Mn atom, both lying on threefold inversion axes, and one NH(3) and one CN group. The octa-hedral environments around Co(II) and Mn(II) are generated by symmetry and show very slight deviations from ideal geometry. A three-dimensional network is created by N-H⋯N hydrogen bonds.