Sylvania is a city in Lucas County, Ohio, United States. The population was 18,965 at the 2010 census. Sylvania is a suburb of Toledo. Its northern border is the southern border of the State of Michigan.

Sylvania was platted in 1836. A post office called Sylvania has been in operation since 1859. Sylvania was incorporated in 1867.

Sylvania is located at 41°42′41″N 83°42′12″W / 41.71139°N 83.70333°W / 41.71139; -83.70333 (41.711450, -83.703210).

According to the United States Census Bureau, the city has a total area of 6.53 square miles (16.91 km²), of which, 6.48 square miles (16.78 km²) is land and 0.05 square miles (0.13 km²) is water.

Sylvania is approximately 10 miles west-northwest of Toledo, Ohio.

As of the census of 2010, there were 18,965 people, 7,642 households, and 5,092 families residing in the city. The population density was 2,926.7 inhabitants per square mile (1,130.0/km²). There were 8,165 housing units at an average density of 1,260.0 per square mile (486.5/km²). The racial makeup of the city was 92.4% White, 2.7% African American, 0.1% Native American, 2.3% Asian, 0.1% Pacific Islander, 0.7% from other races, and 1.7% from two or more races. Hispanic or Latino of any race were 2.9% of the population.

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