It will get £474,900, along with another £100k specifically for Norfolk Showground Ltd, which manages the events venue to the west of Norwich.
RNAA managing director Mark Nicholas said the funding would secure its future and culminate in the return of the Royal Norfolk Show in 2022.
He said: The last 18 months have been extremely challenging for organisations such as ourselves and this grant will enable the RNAA and Norfolk Showground Ltd to power forward in the months ahead as we welcome visitors to Norfolk Showground. This funding will help us invest in the Showground site, deliver the roll-out of summer and autumn cultural programme and enhance our systems and process to improve our resilience in dealing with changes as a consequence of the pandemic.