(E)-1-Methyl-2-styrylpyridinium iodide.

In the title compound, C(14)H(14)N(+)·I(-), the cation exists in an E configuration with respect to the ethenyl bond and is slightly twisted, the inter-planar angle between the pyridinium and phenyl rings of the cation being 4.8 (2)°. In the crystal packing, the cations are stacked in an anti-parallel fashion along the a axis by a π-π inter-action involving both pyridinium and phenyl rings; the centroid-centroid distance is 3.542 (3) Å. Each iodide ion is sandwiched between two cations. The cations and iodide anions are linked together by weak C-H⋯I inter-actions, giving rise to ladder-like ribbons along the a axis.