Gravity observations were made at 292 locations in the Coso Hot Springs area, California (figs. 1 and 2). The field work was completed during June 1976 by William F. Isherwood and Jerry H. Hassemer using LaCoste-Romberg Gravity Meters G-131 and G-159. The purpose of the gravity survey is to provide background geophysical data to evaluate the geothermal potential of the area. The present survey fills in gaps of coverage on previous gravity maps of the region (Nilsen and Chapman, 1971, and Chapman and others, 1971).