The community, which is designed to serve adults 65 and older, is located on north side of Ottawa, south of Interstate 80 and ... one mile east of Highway 23. Ottawa is nestled in a beautiful valley where the Fox River and Illinois River converge. The historic city is in LaSalle County between Morris, LaSalle and Peru. Heritage Woods is fully certified through the Illinois Supportive Living Program, which means seniors can live at our community, regardless of their income. read more