The Empire District Electric Company (railcar reporting mark: EDEX) is an investor-owned utility providing electric, natural gas (through its wholly owned subsidiary The Empire District Gas Company), and water service with approximately 215,000 customers in Missouri, Kansas, Oklahoma, and Arkansas.

Empire was organized in 1909, although tracing its history goes back beyond the turn of the century as the mining industry grew in the service area.

Today, the Company utilizes over 1,200 miles of transmission line and over 1,300 megawatts of owned capacity to serve over 165,000 electric customers.

However, the company was ordered by the court to begin paying solar rebates in May 2015, just as other state electric providers such as Ameren and Kansas City Power had already been doing for over five years.

[2] On February 9, 2016, Empire announced its merger with Algonquin Power & Utilities Corporation of Oakville, Ontario, Canada.