Adjacent counties

• Fulton County (north)
• Lucas County (northeast)
• Wood County (east)
• Putnam County (south)
• Defiance County (west)
• Williams County (northwest)
• Hancock County (southeast)

2000 census

As of the census^[10] of 2000, there were 29,210 people, 10,935 households, and 7,960 families living in the county. The population density was 70 people per square mile (27 people/km²). There were 11,622 housing units at an average density of 28 units per square mile (11/km²). The racial makeup of the county was 95.33% White, 0.58% Black or African American, 0.26% Native American, 0.42% Asian, 2.56% from other races, and 0.85% from two or more races. 5.40% of the population were Hispanic or Latino of any race. 94.3% spoke English, 3.7% Spanish and 1.7% German as their first language.

There were 10,935 households, out of which 35.20% had children under the age of 18 living with them, 61.10% were married couples living together, 8.10% had a female householder with no husband present, and 27.20% were non-families. 23.50% of all households were made up of individuals, and 10.40% had someone living alone who was 65 years of age or older. The average household size was 2.62 and the average family size was 3.10.

In the county, the population was spread out, with 27.60% under the age of 18, 8.20% from 18 to 24, 28.10% from 25 to 44, 22.10% from 45 to 64, and 14.00% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 97.60 males. For every 100 females age 18 and over, there were 93.60 males.

The median income for a household in the county was $42,657, and the median income for a family was $49,881. Males had a median income of $35,901 versus $24,076 for females. The per capita income for the county was $18,667. About 5.30% of families and 7.00% of the population were below the poverty line, including 9.90% of those under age 18 and 4.20% of those age 65 or over.

2010 census

As of the 2010 United States Census, there were 28,215 people, 10,934 households, and 7,883 families living in the county.^[11] The population density was 67.8 inhabitants per square mile (26.2/km²). There were 11,963 housing units at an average density of 28.8 units per square mile (11.1 units/km²).^[12] The racial makeup of the county was 95.2% white, 0.4% black or African American, 0.4% Asian, 0.3% American Indian, 2.4% from other races, and 1.3% from two or more races. Those of Hispanic or Latino origin made up 6.6% of the population.^[11] In terms of ancestry, 53.7% were German, 10.6% were Irish, 7.1% were English; 6.9% identified as "American".^[13]

Of the 10,934 households, 33.3% had children under the age of 18 living with them, 58.2% were married couples living together, 9.3% had a female householder with no husband present, 27.9% were non-families, and 23.7% of all households were made up of individuals. The average household size was 2.55 and the average family size was 2.99. The median age was 39.8 years.^[11]

The median income for a household in the county was $48,367 and the median income for a family was $58,587. Males had a median income of $44,953 versus $32,127 for females. The per capita income for the county was $22,638. About 8.0% of families and 10.6% of the population were below the poverty line, including 13.5% of those under age 18 and 5.9% of those age 65 or over.^[14]

Airport

Henry County Airport is a public use airport located 3 nautical miles (6 km) east of the central business district of Napoleon, Ohio. It is owned by the Henry County Airport Authority.^[17]

City

• Napoleon (county seat)

Villages

Townships

Census-designated place

• Ridgeville Corners

Unincorporated communities

• Colton
• Elery
• Gerald
• Grelton
• Okolona
• Pleasant Bend
• Texas