This species ranges widely in the east of the United States, extending into southern Canada. Its range extends from southern New England and southern Ontario west to southeastern Minnesota, and south to southern Texas, the entire Gulf Coast, and southern Florida (Conant and Collins 1991). As defined by Burbrink (2001), the range of Pantherophis obsoletus is as follows: west of the Mississippi River from southern Louisiana along the Gulf Coast to southern Texas, west to central Texas on the Edwards Plateau, and through Oklahoma, central and eastern Kansas, southeastern Nebraska, and southeastern Iowa to extreme southeastern Minnesota. However, this taxonomy/distribution has not been adopted in this database.