Back to list July 29, 2015 Cumberland County ranks in Top 5 in PA for Retirement Ready counties In a recent study of Retirement Ready counties, Cumberland County ranked #5 in Pennsylvania, according to SmartAsset.com. The ranking shows counties with the highest ratio of wealth to cost of living. Cumberland County made the list based on how the median household wealth and Social Security income measured against the local cost of living. To see the methodology and the complete list, click here.