An overview of the general cost of living index for Langley Park, MD is displayed above for your reference. Residents in Langley Park, MD enjoy a cost of living index of 120. This index is equal to the Maryland average, and 20% 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 Langley Park, MD, the average cost of goods and services is 12% higher than it is in Maryland, and it is 23% higher than the national average.