The 2018–19 RFU Championship, known for sponsorship reasons as the Greene King IPA Championship, is the tenth season of the professionalised format of the RFU Championship, the second tier of the English rugby union league system run by the Rugby Football Union. It is contested by eleven English clubs and one from Jersey in the Channel Islands. The competition is sponsored by Greene King for a sixth successive season. Clubs in the league also competed in the inaugural RFU Championship Cup.