Claim: The La Moine River ( a 125-mile-long (201 km) tributary of the Illinois River in western Illinois in the United States) rises in southwestern Warren County and its lower course passes through the village of Ripley.
Evidence: La Moine River is a 125-mile-long (201 km) tributary of the Illinois River in western Illinois in the United States. La Moine River rises in southwestern Warren County and initially flows southwestwardly through southeastern Henderson and northwestern McDonough counties into Hancock County, where it turns to the southeast and flows through McDonough and Schuyler counties. In its lower course the river passes the village of Ripley and is used to define a portion of the boundary between Schuyler and Brown counties.