The results of viscosity measurements of a series of creosotes distilled from a single tar are given. It was found that these creosotes are truly viscous solutions which permits the designation of the data as absolute viscosity. The viscosity‐temperature data conform to two equations, one an empirical relationship previously found in an analogous series of crude oils, the other developed from theoretical considerations. It is remarkable that in spite of the complex nature of creosote, the viscosity data permit one to regard the material boiling below 355°C as solvent and the residue above that temperature as solute. This is not true for any other temperature limit customarily used in creosote analysis.