Islamic Iran Nation's Union Party or Nation's Union Party[a] (Persian: حزب اتحاد ملت ایران اسلامی, Hezb-e Ettehad-e Mellat-e Iran-e Eslami) is an Iranian reformist political party founded in 2015.

[4] In January 2015, it was confirmed by the Ministry of Interior that it had received a request for a permit to establish a new political party.

The reformists had carried out some six similar initiatives for party formation in the past six months.

[2] The party’s declaration mentions that "a group of the nation’s children have gathered with the intention to take a new step toward the ideals of the revolution and the demands of the reform movement based on the constitution and the nation’s rights mentioned in its third chapter.

[8] The Central Council of the party consists of 30 members, including Gholamreza Ansari, Hamidreza Jalaeipour, Fatemeh Rakeei and Jalal Jalalizadeh.