 Allegheny woodrats are mainly distributed along the Appalachian Mountains.They have historically been found as far north as Connecticut and possibly Massachusetts, where they are now extirpated (extinct), southeastern New York (extirpated), northern New Jersey, and northern Pennsylvania southwestward through western Maryland, Tennessee, Kentucky, West Virginia, northern and western Virginia to northeastern Alabama and northwestern North Carolina with isolated populations north of the Ohio River in southern Ohio (extirpated) and southern Indiana (reintroduced).The Tennessee River is generally accepted as the southern range limit.