5,6-Dimethyl-1H-benzimidazol-3-ium nitrate.

The title salt, C9H11N2+·NO3−, features a planar cation (r.m.s. for 11 non-H atoms = 0.016 A). In the crystal, N—H⋯O hydrogen bonds link nitrate and benzimidazole ions into a three-dimensional network.