Ithaca, OHIthaca, Ohio. Ithaca, Ohio, in Darke county, is 22 miles NW of Dayton, Ohio (center to center) and 53 miles N of Cincinnati, Ohio. The village has a population of 102.
Ithaca, OHSevere Thunderstorm Watch 670 remains in effect until 800 PM EDT OH . Ohio counties included are Allen Ashland Auglaize Champaign Clark Clinton