Oil shale resource data are provided for a 1,300 square mile area around Farson, Wyoming. The data were derived form analyses of samples from 14 core holes drilled by the U. S. Bureau of Mines and the Department of Energy, plus 4 core holes drilled by private companies. Fischer assay oil yield data for nine stratigraphic resource units are tabulated, correlated, and contoured to provide an assessment of shale oil potential in the area.