Using a national data base of urban hospitals, the effect of ownership (government, nonprofit, and for-profit) on the technical efficiency of hospitals was examined. Efficiency scores were computed using a method called data envelopment analysis. Controlling for environmental and hospital characteristics, for-profit hospitals were found somewhat less frequently and government hospitals consistently more frequently in the efficient category. When examining highly inefficient hospitals as a percentage of those receiving inefficient scores, for-profit hospitals appeared to be highly inefficient relative to the other ownership forms. Government and nonprofit hospitals were somewhat indistinguishable from one another regarding their percentages of highly inefficient scores. For-profit hospitals also tended to use supply and capital asset (hospital size) inputs less efficiently, and service and labor inputs more efficiently than hospitals in the other ownership categories.