Technical Abstract: Kernels from corn (Zea Mays L.) are one of the most economical sources of metabolizable energy used in livestock feeding and starch used for the processing industry for food and industrial products. Starch is the most important fraction from the wet-milling process and indicates the ease with which kernel components are separated. Corn breeders have developed new hybrids with enhanced compositional characteristics that are available to growers but corn lines from exotic germplasm represent little of the germplasm base used to produce the hybrids grown in the United States. Studies to determine the physical, compositional, and wet-milling properties of new hybrids, as well as the proximate composition of recovered fractions, need to be conducted at the laboratory level before these materials are of value to the corn processing industry. Ten lines from the Germplasm Enhancement of Maize (GEM) project with exotic germplasm introgressed from Argentina, Chile, Uruguay, Cuba and Florida were crossed to three adapted inbred lines and grain from the resulting thirty hybrids were evaluated to determine their physical, compositional, and wet-milling characteristics and the expression of heterosis in these variables. The B73 x Mo17 hybrid was used as control. The F2 or grain generation of these 30 experimental hybrids, obtained by self-pollination of the F1, was analyzed using both Near-Infrared transmittance (NIT) technology and a 100-g wet-milling procedure. There was great variation among physical, compositional, and wet-milling characteristics and some of the experimental hybrids with exotic origin, such as AR285, CH182, and FS32 by tester 3 and CU562 by tester 2, had better starch yield and starch recovery than B73xMo17, which suggests that genetic diversity is present and that potential to improve wet-milling characteristics of hybrids grown in the United States through breeding can be found in exotic germplasm.