The eggs of 10 species of stink bugs found on cotton or soybeans are described, including size, chorion, and number and length of the micropylar processes; electron micrographs are provided for each species. In addition, egg size and length of the processes are compared among the species. Eggs of Acrosternum hilare (Say) and Thyanta custator accerra McAtee were the largest and smallest, respectively. Eggs of Podisus maculiventris (Say) had the longest micropylar processes, followed by those of Piezodorus guildinii (Westwood). The smallest processes were those of T. c. accerra. The number of micropylar processes ranged from 19 in P. maculiventris to 79 in Oebalus pugnax (F.). In addition, to these characters, the number of eggs per egg mass and the North American distributions of each species is given. Finally, a key is presented for identification of the pentatomid eggs found on cotton and soybeans in the southeastern United States.