n.

a region created by territorial division for the purpose of local government

"the county has a population of 12,345 people"

the largest administrative district within a state

"the county plans to build a new road"

Systems of trauma care. A study of two counties.
Cerebral palsy in four northern California counties, births 1983 through 1985 *
MINIMUM WAGE EFFECTS ACROSS STATE BORDERS: ESTIMATES USING CONTIGUOUS COUNTIES
Air pollution and hospital admissions for heart disease in eight U.S. counties.
Incidence of Crohn''s Disease in Four Counties in Southeastern Norway, 1990a??93 A Prospective Population-Based Study
Eight Americas: Investigating Mortality Disparities across Races, Counties, and Race-Counties in the United States
Direct and Indirect Effects of Rotavirus Vaccination Upon Childhood Hospitalizations in 3 US Counties, 2006–2009
The impact of organized mammography service screening on breast carcinoma mortality in seven Swedish counties
The natural history of community-acquired hepatitis C in the United States. The Sentinel Counties Chronic non-A, non-B Hepatitis Stu...
Acute non-A-E hepatitis in the United States and the role of hepatitis G virus infection. Sentinel Counties Viral Hepatitis Study Te...