In the past six decades, pretrial detention systems have undergone waves of reform. Despite these efforts, pretrial jail populations across the country continue to swell. The causes of such growth in jail populations are difficult to pinpoint, but some are more readily apparent: Fear over rising crime rates, judicial reluctance to release accused persons, and monetary burdens associated with release have all contributed to increased detention pretrial across criminal legal systems in the United States. This article examines various pretrial detention reform efforts and highlights the need for greater research in the area.