An overview of the general cost of living index for Oak Ridge, TN is displayed above for your reference. Residents in Oak Ridge, TN enjoy a cost of living index of 86. This index is 5% lower than the Tennessee average, and 14% lower than the national average. The following categories are used when determining the cost of living index for any given city: health care (5%), transportation (9%), utilities (10%), groceries (13%), housing (30%), and goods/services (33%). Clearly, housing and goods/services make up the majority of the formula for calculating the cost of living index. Because of this, the general cost of living for any given area can be estimated by looking at the cost of everyday goods in that area. For those living in Oak Ridge, TN, the average cost of goods and services is 10% lower than it is in Tennessee, and it is 13% lower than the national average.