DEMCO was formed in August of 1938 to serve 750 members in East Baton Rouge, East Feliciana and Livingston parishes.

DEMCO is a Top 100 company of Greater Baton Rouge and one of the largest local businesses in this region of the state. Currently powering over 112,000 meters in seven parishes of Southeast Louisiana, DEMCO service areas include: Ascension, East Baton Rouge, East Feliciana, Livingston, St. Helena, Tangipahoa, and West Feliciana. DEMCO is a $700 million not-for-profit electric cooperative, with an integrated electric distribution system that covers 2,400 square miles. DEMCO is one of the fastest-growing cooperatives in the nation.