In this analysis, we (1) provide an overview of the state correctional population; (2) discuss our projections of the population through 2024-25, and (3) comment on how changes in the sizes of these populations could impact state correctional costs in both the near and long term. Specifically, we estimate that the number of inmates, parolees, and wards in the state’s correctional system will significantly decline due to two main factors—operational changes that the California Department of Corrections and Rehabilitation (CDCR) has taken to mitigate the spread of COVID-19 and various policy changes recently enacted that will further reduce the size of the state correctional population in the long term. We also estimate that these population declines will substantially slow the expected growth in CDCR’s overall projected costs through 2024-25—partially through the closure of five prisons. This publication is part of our The 2021-22 Budget: California’s Fiscal Outlook series.