An overview of the general cost of living index for Leonia, NJ is displayed above for your reference. Residents in Leonia, NJ enjoy a cost of living index of 163. This index is 31% higher than the New Jersey average, and 63% higher 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 Leonia, NJ, the average cost of goods and services is 33% higher than it is in New Jersey, and it is 49% higher than the national average.