Calvin covers a total area of about 1.3 sq. kms. and is located at an elevated height of about 740 ft. above the sea level. It is located in the County of Hughes in the state of Oklahoma. Most of the local residents are engaged in diversified economic activities like health care and education. Some are also involved with local trade and other business activities in the region. Some locals are also found to be engaged in business activities related with small shops and stores in the town.