Davidson County is one of about 3,141 counties and county equivalents in the United States. It has 502.3 sq. miles in land area and a population density of 1,246.6 per square mile. In the last three decades of the 1900s its population grew by 27.2%. On the 2000 census form, 98.0% of the population reported only one race, with 25.9% of these reporting African-American. The population of this county is 4.6% Hispanic (of any race). The average household size is 2.30 persons compared to an average family size of 2.96 persons. In 2008 health care and social assistance was the largest of 20 major sectors. It had an average wage per job of $53,715. Per capita income grew by 21.4% between 1997 and 2007 (adjusted for inflation).

People & Income Overview (By Place of Residence)	Value	Rank in U.S.	Industry Overview (2008) (By Place of Work)	Value	Rank in U.S.
Population (2008)	626,144	97	Covered Employment	437,086	59
Growth (%) since 1990	22.6%	911	Avg wage per job	$46,595	150
Households (2000)	237,405	86	Manufacturing - % all jobs in County	5.5%	2178
Labor Force (persons) (2008)	324,197	94	Avg wage per job	$50,386	497
Unemployment Rate (2008)	5.2	1776	Transportation & Warehousing - % all jobs in County	4.6%	531
Per Capita Personal Income (2007)	$43,394	172	Avg wage per job	$46,223	453
Median Household Income (2007)	$46,430	878	Health Care, Social Assist. - % all jobs in County	14.7%	515
Poverty Rate (2007)	15.2	1329	Avg wage per job	$53,715	49
H.S. Diploma or More - % of Adults 25+ (2000)	81.5	1,174	Finance and Insurance - % all jobs in County	4.4%	346
Bachelor's Deg. or More - % of Adults 25+ (2000)	30.5	201	Avg wage per job	$69,609	112