Adjacent counties

• Wood County (north)
• Seneca County (northeast)
• Wyandot County (southeast)
• Hardin County (south)
• Allen County (southwest)
• Putnam County (west)
• Henry County (northwest)

2000 census

As of the census^[11] of 2000, there were 71,295 people, 27,898 households, and 19,138 families living in the county. The population density was 134 inhabitants per square mile (52/km²). There were 29,785 housing units at an average density of 56 units per square mile (22/km²). The racial makeup of the county was 95.14% White, 1.11% Black or African American, 0.18% Native American, 1.22% Asian, 0.02% Pacific Islander, 1.22% from other races, and 1.12% from two or more races. 3.07% of the population were Hispanic or Latino of any race.

There were 27,898 households, out of which 32.60% had children under the age of 18 living with them, 56.40% were married couples living together, 8.70% had a female householder with no husband present, and 31.40% were non-families. 26.00% of all households were made up of individuals, and 9.80% had someone living alone who was 65 years of age or older. The average household size was 2.49 and the average family size was 3.01.

In the county, the population was spread out, with 25.70% under the age of 18, 9.70% from 18 to 24, 28.70% from 25 to 44, 22.60% from 45 to 64, and 13.20% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 94.30 males. For every 100 females age 18 and over, there were 91.20 males.

The median income for a household in the county was $43,856, and the median income for a family was $51,490. Males had a median income of $37,139 versus $24,374 for females. The per capita income for the county was $20,991. About 5.20% of families and 7.50% of the population were below the poverty line, including 8.80% of those under age 18 and 6.10% of those age 65 or over.

2010 census

As of the 2010 United States Census, there were 74,782 people, 30,197 households, and 19,884 families living in the county.^[12] The population density was 140.7 inhabitants per square mile (54.3/km²). There were 33,174 housing units at an average density of 62.4 units per square mile (24.1 units/km²).^[13] The racial makeup of the county was 93.4% white, 1.7% Asian, 1.5% black or African American, 0.2% American Indian, 1.4% from other races, and 1.8% from two or more races. Those of Hispanic or Latino origin made up 4.5% of the population.^[12] In terms of ancestry, 43.1% were German, 11.0% were Irish, 10.3% were English, and 6.6% were American.^[14]

Of the 30,197 households, 30.7% had children under the age of 18 living with them, 51.3% were married couples living together, 10.0% had a female householder with no husband present, 34.2% were non-families, and 27.9% of all households were made up of individuals. The average household size was 2.42 and the average family size was 2.94. The median age was 38.5 years.^[12]

The median income for a household in the county was $49,070 and the median income for a family was $59,600. Males had a median income of $42,479 versus $31,631 for females. The per capita income for the county was $25,158. About 8.5% of families and 11.4% of the population were below the poverty line, including 15.2% of those under age 18 and 5.7% of those age 65 or over.^[15]

Cities

• Findlay (county seat)
• Fostoria

Villages

Townships

Unincorporated communities

Ghost town

Moffit^[16]