This brief presents summary findings from an Urban Institute study examining the degree of racial and ethnic disparity in probation revocation outcomes and the drivers of that disparity in four diverse probation jurisdictions. Black probationers were revoked at higher rates than white and Hispanic probationers in all study sites. Differences in risk assessment scores and criminal history were major contributors to the blackwhite disparity. Results for disparity to the disadvantage of Hispanic probationers were mixed. The brief concludes with a discussion of policy implications for probation and the criminal justice system as a whole.