In their second annual study SmartAsset, a New York financial technology company, determines the places in America where Social Security goes furthest. The study analyzes Social Security income, cost of living data, and taxes across all counties to determine where people are getting the most mileage out of Social Security. Coffee County cracked the list at number 8 in Tennessee, up from their rank of 55 last year. Loudon County ranked 1st and Moore County was 3rd.