The county of Costilla is located in Colorado and was founded in 1861. There are 3,887 residents in Costilla who have access to courthouses in Blanca, San Luis. In general, each county has a full set of courts, from traffic court to superior and appellate court; supreme courts are usually located in the state capital. Colorado is part of the 10th federal circuit court as well.
There are 385 residents in Blanca, which is 1.8 square miles and 7,756ft above sea level.
There are 629 residents in San Luis, which is 0.6 square miles and 7,979ft above sea level. It was settled in 1851-04-09 and is governed by a Statutory Town local government.