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The title compound, C 12 H 9 N 3 O 2 , adopts an  E  conformation at the imine double bond. The pyridyl ring makes a dihedral angle of 47.78 (5)° with the benzene ring, indicating the mol­ecule is twisted. In the crystal, mol­ecules are π–π stacked into columns parallel to [100], with an inter­planar separation of 3.8537 (8) Å, corresponding to the length of the  a  axis. The chains are further linked  via  weak C—H⋯O and C—H⋯N hydrogen bonds, forming two-dimensional sheets parallel to (010). The sheets interact by van der Waals inter­actions.

Crystal structure of 4-nitro-N-[(pyridin-2-yl)methylidene]aniline