Collin and Denton counties rank among the top five counties in Texas for overall health outcomes. For 2020, Collin County was ranked No. 1 and Denton County was ranked No. 3 among the healthiest counties in Texas, according to the Robert Wood Johnson Foundation. Collin County was also ranked No. 1 for health factors, while Denton County was ranked No. 6. Below is a snapshot of how Collin County ranks among other Texas Counties on various health measures.