Nassau and Suffolk counties are among the 10 healthiest counties in New York, according to a study released Wednesday.

Nassau ranked first of the state’s 62 counties in “health factors,” which include areas such as health care access and education levels, and fourth in “health outcomes,” which include rates of premature deaths, “poor or fair health” and low birth weights.

Suffolk ranked lower than Nassau: Eighth in health factors and 10th in health outcomes.  

In last year's report, Nassau ranked first in health factors and second in health outcomes, and Suffolk ranked eighth in health factors and 11th in health outcomes.

The report was compiled by the Robert Wood Johnson Foundation and the University of Wisconsin Health Population Institute.

The annual rankings take data from the past several years from multiple sources.