The First National Assembly of Epidaurus (Greek: Αʹ Εθνοσυνέλευση της Επιδαύρου, 1821–1822) was the first meeting of the Greek National Assembly, a national representative political gathering of the Greek revolutionaries.
The majority of the representatives were local notables and clergymen from the Peloponnese, Central Greece and the islands. In addition, a number of Phanariotes and academics attended. However, a number of prominent revolutionaries, including Alexander Ypsilantis and the most prominent military leaders were absent. Of the 59 representatives at the assembly, 20 were landowners, 13 were ship-owners, 12 were intellectuals, 4 were military leaders, 3 were archpriests, 3 were merchants, with and 4 others.
The assembly passed a number of important documents, including:
The first legislature had 33 members.
Another characteristic of the First National Assembly is the absence of any reference in the Constitution to the Filiki Eteria, although Dimitrios Ypsilantis, brother of Alexandros Ypsilantis and official representative of the Filiki Eteria, was appointed president of the legislature, a body controlled by the local notables.