  wyandot county is a county located in the u.s. state of ohio. according to the 2010 census, it has a population of 22,615, which is a decrease of 1.3% from 22,908 in 2000. its county seat is upper sandusky. its name comes from the wyandot indians and is variously translated from their language as "around the plains" and "dwellers on the peninsula".  ==geography== according to the 2010 census, the county has a total area of , of which  (or 99.83%) is land and  (or 0.17%) is water. ===adjacent counties=== *seneca county (north) *crawford county (east) *marion county (south) *hardin county (southwest) *hancock county (northwest) ==demographics== {{uscensuspop |1850=11194 |1860=15596 |1870=18553 |1880=22395 |1890=21722 |1900=21125 |1910=20760 |1920=19481 |1930=19036 |1940=19218 |1950=19785 |1960=21648 |1970=21826 |1980=22651 |1990=22254 |2000=22908 |2010=22615 |estyear=2012 |estimate=22607 |footnote=u.s. decennial census{{cite web|url=http://www.census.gov/prod/www/decennial.html|title=u.s. decennial census|publisher=census.gov|accessda
1845_establishments_in_the_United_States Ohio_counties Wyandot_County,_Ohio