Of 3,142 counties in the United States in 2014, the Institute for Health Metrics and Evaluation ranked Seminole County 3,014 in the average life expectancy at birth of male residents and 3,108 in the life expectancy of female residents, the lowest life expectancy of Oklahoma counties and among the lowest life expectancy for all counties. Males in Seminole County lived an average of 70.2 years and females lived an average of 75.4 years compared to the national average for life expectancy of 76.7 for males and 81.5 for females.