Determining the sizes and characteristics of home ranges among American Crows (Corvus brachyrhynchos) in spring/summer is essential for understanding the importance of this species in the transmission of West Nile virus. In late spring, summer, and early fall of 2002, we radio-tracked 45 American Crows to estimate their movements and habitat preferences in urban and adjacent agricultural habitats in east-central Illinois. The 95% minimum convex polygon home ranges averaged 9.6, 6.7, and 6.4 km² for hatch-year, sub-adult, and adult crows, respectively. Proportional habitat use was investigated at two scales: (a) at the study site scale, there was a preference for low- to medium-density urban habitat and avoidance of forested habitat; and (b) at the home range scale, there was a preference for agricultural cover and avoidance of high-density urban habitat.