The rheology of the products of coal liquefaction was investigated using a Weissenberg Rheogoniometer, Model R-16, modified to allow total-normal-force measurements. Solvent extracted oils and asphaltene fractions were tested separately and when in combination with the preasphaltene fraction and residual solids. The solids-free fractions showed slight shear thinning and very little viscoelasticity. Solids-free liquids containing asphaltenes showed positive first-normal-stress differences and negative second-normal-stress differences, both varying with approximately the first power of shear rate. The addition of residual solids to the coal-derived liquids caused a dramatic change in rheology for H-Coal liquefaction material. Pronounced shear thinning was observed for solids concentrations greater than 15 wt.% in a mixture of H-Coal oils, asphaltenes and preasphaltenes. Time—temperature superposition of viscosity isotherms indicated finite zero-shear viscosities. The addition of solids enhanced the viscoelasticity, giving dynamic rigidities which increased weakly with increasing frequency. The presence of suspended residual solids also altered the shear rate dependence of the normal stress differences. The first-normal-stress difference was positive and varied with approximately the second power of shear rate. The second-normal-stress difference was negative, varying with approximately the 0.7 power of shear rate. The effects of shear rate history on the transient behavior at the onset of steady shearing support the conclusion that residual solids in coal-derived liquids can form loose flocs. It is further concluded that these flocs immobilize significant amounts of liquid giving large zero-shear viscosities. The floc network imparts an elastic character to the coal-derived material and the breakdown of this floc with increasing shear rate gives the observed shear thinning.