This unique Life Expectancy by county Map allows you to view the United States as a whole or to add each range (color) one at a time. To activate this feature clear the map and click on the the color of ranges.
Institute for Health Metrics and Evaluation: 2009
Beginning in 2009 the US Gov has increased the amount of data they suppress for certain states, counties and races for privacy reasons due to small death counts. If the data you are looking for is not included that is likely the reason.