Wake County has been named the overall healthiest county in North Carolina for the fourth year in a row, according a report released Wednesday by two nonprofit organizations.

The ranking is based on 25 different factors — from childhood poverty to health-care access — and is prepared by the County Health Rankings and Roadmaps program. A collaboration between the University of Wisconsin Population Health Institute and the Robert Wood Johnson Foundation, the program ranks more than 3,000 counties across the United States.

“The County works closely with the medical community as well as partner agencies and programs to ensure that our residents have the tools they need to be healthy,” said Wake County Human Services Director Ramon Rojano. “The rankings serve as a score card that inspires all communities in the country to keep improving.”

Additional factors considered include rates of smoking, teen birth and education; access to healthy foods; levels of physical inactivity and percentages of children in single-parent households.

The report is published online at www.countyhealthrankings.org.