Butler County is one of about 3,141 counties and county equivalents in the United States. It has 467.3 sq. miles in land area and a population density of 787.8 per square mile. In the last three decades of the 1900s its population grew by 47.1%. On the most recent census form, 97.9% of the population reported only one race, with 7.3% of these reporting African-American. The population of this county is 4.0% Hispanic (of any race). The average household size is 2.60 persons compared to an average family size of 3.10 persons. In 2010 manufacturing was the largest of 20 major sectors. It had an average wage per job of $63,366. Per capita income declined by 4.3% between 1999 and 2009 (adjusted for inflation).

People & Income Overview (By Place of Residence)	Value	Rank in U.S.	Industry Overview (2010) (By Place of Work)	Value	Rank in U.S.
Population (2010 Census Count)	368,130	180	Covered Employment	137,975	191
Growth (%) since 1990	26.3%	799	Avg wage per job	$41,215	413
Households (2010)	135,960	183	Manufacturing - % all jobs in County	14.0%	991
Labor Force (persons) (2010)	188,190	175	Avg wage per job	$63,366	214
Unemployment Rate (2010)	9.6	1310	Transportation & Warehousing - % all jobs in County	5.5%	386
Per Capita Personal Income (2009)	$34,654	1074	Avg wage per job	$41,026	1340
Median Household Income (2009)	$53,543	426	Health Care, Social Assist. - % all jobs in County	13.0%	904
Poverty Rate (2009)	13.2	2030	Avg wage per job	$37,899	784
H.S. Diploma or More - % of Adults 25+ (2010 ACS 5yr)	86.8	1,160	Finance and Insurance - % all jobs in County	5.5%	163
Bachelor's Deg. or More - % of Adults 25+ (2010 ACS 5yr)	25.9	550	Avg wage per job	$60,590	225