2000 census
As of the census [11] of 2010, there were 146,156 people, 54,310 households, and 39,846 families living in the county. The population density was 289 inhabitants per square mile (112/km2). There were 58,678 housing units at an average density of 116 units per square mile (45/km2). The racial makeup of the county was 90.02% White, 6.00% Black or African American, 0.20% Native American, 1.10% Asian, 0.00% Pacific Islander, 0.23% from other races, and 1.90% from two or more races. 1.70% of the population were Hispanic or Latino of any race.
There were 54,310 households, out of which 34.10% had children under the age of 18 living with them, 57.30% were married couples living together, 11.20% had a female householder with no husband present, and 26.60% were non-families. 21.90% of all households were made up of individuals, and 8.40% had someone living alone who was 65 years of age or older. The average household size was 2.64 and the average family size was 3.07.
In the county, the population was spread out, with 26.30% under the age of 18, 8.00% from 18 to 24, 30.20% from 25 to 44, 23.90% from 45 to 64, and 12.40% who were 65 years of age or older. The median age was 38.2 years. For every 100 females, there were 99.20 males. For every 100 females age 18 and over, there were 96.30 males.
The median income for a household in the county was $47,962, and the median income for a family was $55,539. Males had a median income of $39,566 versus $27,353 for females. The per capita income for the county was $21,671. About 4.50% of families and 5.90% of the population were below the poverty line, including 7.40% of those under age 18 and 6.20% of those age 65 or over.
2010 census
As of the 2010 United States Census, there were 146,156 people, 54,310 households, and 39,846 families living in the county. [12] The population density was 289.8 inhabitants per square mile (111.9/km2). There were 58,687 housing units at an average density of 116.3 units per square mile (44.9 units/km2). [13] The racial makeup of the county was 90.2% white, 6.0% black or African American, 1.1% Asian, 0.2% American Indian, 0.6% from other races, and 1.9% from two or more races. Those of Hispanic or Latino origin made up 1.7% of the population. [12] In terms of ancestry, 31.2% were German, 16.2% were Irish, 11.7% were English, 8.6% were American, and 5.2% were Italian. [14]
Of the 54,310 households, 37.3% had children under the age of 18 living with them, 57.3% were married couples living together, 11.2% had a female householder with no husband present, 26.6% were non-families, and 21.9% of all households were made up of individuals. The average household size was 2.64 and the average family size was 3.07. The median age was 38.2 years. [12]
The median income for a household in the county was $56,796 and the median income for a family was $65,835. Males had a median income of $49,314 versus $37,209 for females. The per capita income for the county was $26,130. About 7.5% of families and 10.4% of the population were below the poverty line, including 14.7% of those under age 18 and 6.7% of those age 65 or over. [15]
United States
Ohio 
