[3] It was named for the Wyandot Indians, who lived here before and after European encounter.

Their autonym is variously translated from their language as "around the plains" and "dwellers on the peninsula".

25.40% of all households were made up of individuals, and 11.70% had someone living alone who was 65 years of age or older.

As of the 2010 United States Census, there were 22,615 people, 9,091 households, and 6,236 families living in the county.

[14] From 1856 to 1916, Wyandot County was consistently Democratic, voting for the party's candidates in every presidential election in that span.

Wyandot County is represented in the Ohio General Assembly by State Representative Riordan McClain (House District 87) and State Senator Dave Burke (Senate District 26).

McClain was elected to his first full term in November 2018 after having been appointed to the seat in January 2018.

Burke represents the 26th Ohio Senate district, which includes parts or all of 7 counties currently, having been appointed to the seat in July 2011.

Current commissioners are: Ron Metzger, Steven Seitz and Bill Clinger.

[16] The largest solar energy farm in Ohio covers 80 acres (320,000 m2) adjacent to the Wyandot County Airport.