 thumb|mosquito creek reservoir at cortland, ohio. cortland is just off to the right of the picture. view is to the north.thumb|mosquito creek reservoir at cortland, ohio. cortland is just off to the left of the picture. view is to the south. cortland is a city in trumbull county, ohio, united states located on the eastern shore of mosquito creek reservoir. walnut run is the creek that runs through town. the population was 7,104 at the [[2010 united
Cities_in_Ohio Cities_in_Trumbull_County,_Ohio Populated_places_established_in_1874 YoungstownaWarrenaBoardman,_OHaPA_metropolitan_area