Soybean agroecosystems infested with soybean aphid, Aphis glycines (Hemiptera: Aphididae) during 2007 in northwest Ohio were surveyed to determine predatory arthropod communities present. Predatory arthropods were sampled by sweep netting, yellow sticky traps, and direct observations of aphid-infested plants. Soybeans were sampled from time of emergence in May until senescence in late summer. Predatory arthropods included several species of ladybird beetles (Coccinellidae), such as Harmonia axyridis, Coccinella septempunctata, and Coleomegilla maculata, the predatory hemipteran, Orius insidiosus (Anthocoridae), and other predatory Hemiptera (Nabidae and Reduviidae), green lacewings(Neuroptera: Chrysopidae), and spiders (Araneae). A number of these predatory arthropod species may have potential as biological control agents of Aphis glycines in Ohio.