The U.S. Department of Agriculture–Agricultural Research Service (USDA-ARS) stone fruit breeding program at Byron, GA, is one of the few public programs that remain active in developing new peach cultivars adapted to the southeastern climate and suitable for the regional shipping industry. The “prince” series peach cultivars, most of which produce large, firm, melting, freestone fruit with yellow flesh, normal acidity, and high blush, were released to meet this need (Okie, 1993; Okie and Layne, 2008a, 2008b; Okie et al., 1982; Okie and Reilly, 1987). As a continuation of this effort, ‘Crimson Joy’ (tested as BY99P3866) is released, along with two other “Joy” cultivars (Chen and Okie, 2020a, 2020b). This cultivar has a chilling requirement estimated at ≈700 chill hours (CH) and is suited for areas with medium to high chill accumulation. ‘Crimson Joy’ is well adapted to the southeastern climate, has performed well in Georgia and South Carolina, and is suggested for trial wherever ‘GaLa’ or ‘Harvester’ are grown.