The crystal structure of 4,4'-bipyridyl, C10H8N2, at 203 K contains two independent, non-planar, molecules whose mean planes subtend an angle of 14.1(8)degrees. The long axes of the two molecules are oriented at approximately 88 degrees to each other, allowing interaction between the N atoms and phenyl-H atoms on adjacent molecules and thereby giving rise to a sheet structure. The two molecules are primarily differentiated by the dihedral angle between the connected phenyl rings [18.50(12) and 34.85(10)degrees].The crystal structure of 4,4'-bipyridyl, C10H8N2, at 203 K contains two independent, non-planar, molecules whose mean planes subtend an angle of 14.1(8)degrees. The long axes of the two molecules are oriented at approximately 88 degrees to each other, allowing interaction between the N atoms and phenyl-H atoms on adjacent molecules and thereby giving rise to a sheet structure. The two molecules are primarily differentiated by the dihedral angle between the connected phenyl rings [18.50(12) and 34.85(10)degrees].