In the United States
As related to the Population 15 years and over
Compiled using estimates from the American Community Survey, 5-Year, 2009-2013
Census Bureau
American Community Survey, 5-Year

This is a choropleth map that colors counties by the percentage of people who were separated at the time of survey. These are people who are still married but do not live with the spouse. Although no counties reach double digits, the separated status appears to be more common in the south.

One possible reason for this is that some states require a legal separation for a certain amount of time before couples can divorce.