Cortland is a city in Trumbull County, Ohio, United States located on the eastern shore of Mosquito Creek Reservoir 19 miles north of Youngstown. Walnut Run is the creek that runs through town. The population was 7,104 at the 2010 census. It is part of the Youngstown-Warren-Boardman, OH-PA Metropolitan Statistical Area. Cortland became a village in 1874 with the construction of a railroad depot. It became a city in 1980 when its population exceeded 5,000 people.
The area was once known as Baconsburg, after Samuel Bacon, who built a sawmill and several buildings in the area during the early 19th century.
According to the United States Census Bureau, the city has a total area of 4.25 square miles (11.01 km2), all land. According to the City of Cortland webpage, Cortland is located in the heart of Trumbull County, adjacent to Mosquito Reservoir and State Park. State highways 5 and 46 are both accessible through the city.