Stink bugs have recently become an economic pest of cotton, Gossypium hirsutum L., in the Brazos River Bottom production area of Texas, but many producers remain uncertain which species are infesting fields. Cotton and nearby maize (Zea mays L.), sorghum [Sorghum bicolor (L.) Moench], and soybean [Glycine max (L.)] fields were sampled weekly for stink bugs in 2011 and 2012 to determine the complex of species infesting cotton and identify other crops in which stink bugs may develop and then move to cotton. In total, 12 phytophagous stink bug species were collected among the four crops over both years. Seven species were detected in cotton, but the brown stink bug, Euschistus servus (Say), and redshouldered stink bug, Thyanta custator acerra McAtee, collectively, accounted for 80 and 96% of the stink bugs found in 2011 and 2012, respectively. The two species also were the most prevalent encountered in soybean and maize over both years. The absence of southern green stink bug, Nezara viridula (L.), during both years and absence of green stink bug, Acrosternum hilare (Say), in 2012 are interesting because both species were commonly observed in cotton and soybean fields in years before the initiation of the study. Given the prevalence of brown and redshouldered stink bugs in cotton and relative abundance of both species in soybean and, to a lesser extent, maize, soybean and maize might be late-season sources for stink bugs in cotton.