Morgan County is a county located in the state of Ohio. According to the 2010 census, it has a population of 15,054, which is an increase of 1.1% from 14,897 in 2000. Its county seat is McConnelsville and is named for Daniel Morgan, an officer in the American Revolutionary War.

Morgan County was formed on December 29, 1817, from portions of Guernsey, Muskingum and Washington Counties. It was named after Daniel Morgan, a member in the Congress for Virginia, and general in the American Revolutionary War.

According to the 2010 census, the county has a total area of 421.78 square miles (1,092.4 km²), of which 416.42 square miles (1,078.5 km²) (or 98.73%) is land and 5.36 square miles (13.9 km²) (or 1.27%) is water.

As of the census of 2000, there were 14,897 people, 5,890 households, and 4,176 families residing in the county. The population density was 36 people per square mile (14/km²). There were 7,771 housing units at an average density of 19 per square mile (7/km²). The racial makeup of the county was 93.66% White, 3.41% Black or African American, 0.35% Native American, 0.08% Asian, 0.26% from other races, and 2.24% from two or more races. 0.41% of the population were Hispanic or Latino of any race.

Ohio (ⁱ/oʊˈhaɪ.oʊ/) is a state in the Midwestern United States. Ohio is the 34th most extensive, the 7th most populous, and the 10th most densely populated of the 50 United States. The state's capital and largest city is Columbus.

The name "Ohio" originated from Iroquois word ohi-yo’, meaning "great river". The state, originally partitioned from the Northwest Territory, was admitted to the Union as the 17th state (and the first under the Northwest Ordinance) on March 1, 1803. Although there are conflicting narratives regarding the origin of the nickname, Ohio is historically known as the "Buckeye State" (relating to the Ohio buckeye tree) and Ohioans are also known as "Buckeyes".

The government of Ohio is composed of the executive branch, led by the Governor; the legislative branch, which comprises the Ohio General Assembly; and the judicial branch, which is led by the Supreme Court. Currently, Ohio occupies 18 seats in the United States House of Representatives. Ohio is known for its status as both a swing state and a bellwether in national elections.

Morgan County is the name of eleven counties in the United States of America, nine of which were named for Daniel Morgan, Revolutionary War General: