Adjacent counties

2000 census

As of the census^[10] of 2000, there were 53,309 people, 20,419 households, and 14,905 families living in the county. The population density was 89 inhabitants per square mile (34/km²). There were 21,583 housing units at an average density of 36 units per square mile (14/km²). The racial makeup of the county was 98.09% White, 0.39% Black or African American, 0.17% Native American, 0.25% Asian, 0.02% Pacific Islander, 0.34% from other races, and 0.74% from two or more races. 0.86% of the population were Hispanic or Latino of any race. 43.1% were of German, 20.1% American, 8.1% English, 6.8% Irish and 5.8% French ancestry according to Census 2000.

There were 20,419 households, out of which 33.30% had children under the age of 18 living with them, 61.00% were married couples living together, 8.00% had a female householder with no husband present, and 27.00% were non-families. 23.50% of all households were made up of individuals, and 11.00% had someone living alone who was 65 years of age or older. The average household size was 2.56, and the average family size was 3.03.

In the county, the population was spread out, with 26.30% under the age of 18, 7.80% from 18 to 24, 27.50% from 25 to 44, 23.20% from 45 to 64, and 15.30% who were 65 years of age or older. The median age was 37 years. For every 100 females, there were 96.10 males. For every 100 females age 18 and over, there were 93.30 males.

The median income for a household in the county was $39,307, and the median income for a family was $45,735. Males had a median income of $32,933 versus $23,339 for females. The per capita income for the county was $18,670. About 6.00% of families and 8.00% of the population were below the poverty line, including 10.10% of those under age 18 and 9.20% of those age 65 or over.

2010 census

As of the 2010 United States Census, there were 52,959 people, 20,929 households, and 14,673 families living in the county.^[11] The population density was 88.5 inhabitants per square mile (34.2/km²). There were 22,730 housing units at an average density of 38.0 units per square mile (14.7 units/km²).^[12] The racial makeup of the county was 97.8% white, 0.4% black or African American, 0.3% Asian, 0.2% American Indian, 0.4% from other races, and 0.9% from two or more races. Those of Hispanic or Latino origin made up 1.2% of the population.^[11] In terms of ancestry, 38.9% were German, 11.5% were American, 10.6% were Irish, and 9.0% were English.^[13]

Of the 20,929 households, 31.9% had children under the age of 18 living with them, 56.7% were married couples living together, 9.0% had a female householder with no husband present, 29.9% were non-families, and 25.9% of all households were made up of individuals. The average household size was 2.50, and the average family size was 3.00. The median age was 40.8 years.^[11]

The median income for a household in the county was $44,280, and the median income for a family was $53,454. Males had a median income of $40,402 versus $28,310 for females. The per capita income for the county was $21,483. About 7.5% of families and 10.6% of the population were below the poverty line, including 14.5% of those under age 18 and 8.1% of those age 65 or over.^[14]

Public school districts

• Ansonia Local Schools
  • Ansonia High School, Ansonia (the Tigers)
• Arcanum-Butler Local School District
  • Arcanum High School, Arcanum (the Trojans)
• Franklin Monroe Schools
  • Franklin Monroe Middle School/High School, Pitsburg (the Jets)
• Greenville City School District
  • Greenville Senior High School, Greenville (the Green Wave)
• Mississinawa Valley Local School District
  • Mississinawa Valley Junior/Senior High School, Union City (the Blackhawks)
• Tri-Village Local School District
  • Tri-Village High School, New Madison (the Patriots)
• Versailles Exempted Village Schools
  • Versailles High School, Versailles (the Tigers)

City

• Greenville (county seat)

Villages

Townships

^[17]

Unincorporated communities