Wood County is a county located in the U.S. state of Ohio. As of the 2020 census, the population was 132,248. Its county seat is Bowling Green. The county was named for Captain Eleazer D. Wood, the engineer for General William Henry Harrison's army, who built Fort Meigs in the War of 1812. Wood County is part of the Toledo, OH Metropolitan Statistical Area. Its diagonal northwest border is formed by the Maumee River, which has its mouth at Maumee Bay on Lake Erie.

The Toledo Metropolitan Area, or Greater Toledo, or Northwest Ohio is a metropolitan area centered on the American city of Toledo, Ohio. As of the 2020 census, the four-county Metropolitan Statistical Area (MSA) had a population of 646,604. It is the sixth-largest metropolitan area in the state of Ohio, behind Cincinnati–Northern Kentucky, Cleveland, Columbus, Dayton, and Akron.