Jefferson County, CO is a great place to live. The county is home to numerous local companies including Lockheed Martin, Cigna, and Wells Fargo. The cost of living in Jefferson County is also relatively affordable. The average 2 bedroom rent in the area is $1,840 compared to the US average of $1,430. Furthermore, the grocery cost index in Jefferson County is 102 versus 100 in the US making groceries slightly more expensive than average. On the whole, however, Jefferson County remains an affordable place to live for those looking for work or already have established careers in the county.