thumb|[[George Noble Plunkett stood on behalf of the party, albeit also simultaneously on behalf of Sinn Féin]]
Cumann Poblachta na hÉireann (; ) was a political party established by the Irish Republican Army in 1936. It existed until 1937.
It was founded in Barry's Hotel, Dublin, on 7 March 1936, and decided to adopt a policy of abstentionism with regard to any seats it might win in elections to the Free State Oireachtas and the Parliament of Northern Ireland.
In 1936, the party ran two candidates in by-elections to the 8th Dáil:
- At the 1936 Galway by-election, on 13 August, George Noble Plunkett ran as a joint Cumann Poblachta na hÉireann/Sinn Féin candidate. Losing his deposit, he polled 2,696 votes (4.1%).
- At the 1936 Wexford by-election, held on 17 August, Stephen Hayes polled 1,301 votes (2.9%) and lost his deposit.