Grain Power Station is a 1,275 megawatts (1,710,000 hp) operational CCGT power station in Kent, England, owned by Uniper (formerly E.ON UK). It was also the name of an oil-fired, now demolished, 1,320MW power station in operation from 1979 to 2012.

The 1,275MW CCGT power station was constructed on the same site. It consists of three natural gas-fired combined cycle gas turbine units capable of generating enough electricity to supply around one million homes. E.ON was given planning consent to build the station in 2006. Construction work by Alstom started in May 2007 and was finished in May 2010, at a cost of £500 million (some sources state £580 million). The first gas turbine was first fired on 2 June 2010. The overall efficiency was expected to be 72%.

The power station also operates in a combined heat and power (CHP) mode as it is able to transfer up to 340MW of heat energy recovered from the steam condensation to run the vaporisers in the nearby liquefied natural gas terminal, allowing for a reduction in carbon emissions of up to 350,000 tonnes a year.