Seneca County, Ohio

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{island, water, area}
{land, century, early}
{county, mile, population}
{household, population, female}
{specie, animal, plant}
{rate, high, increase}
{area, community, home}
{line, north, south}

Coordinates: 41°08′N 83°08′W / 41.13°N 83.13°W / 41.13; -83.13

Seneca County is a county located in the state of Ohio, United States. As of the 2000 census, the population was 58,683. Its county seat is Tiffin and it is named for the Seneca Indians.[2]

The Tiffin Micropolitan Statistical Area includes all of Seneca County.



The county was barely inhabited until the 1830s, but by 1860 its population had massively increased to about half the current number of inhabitants. It grew slowly from thereon, with periods of more marked increase towards the end of the 19th century, during the Great Depression and the Post-World War II baby boom. In 1980 it was censused at 61,901, and has been declining since. Since about 2000, the county's population declines by about 100-300 persons annually, mainly due to a migration deficit of about 300 persons annually. This decline is projected to continue in the future.[1]

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