A long tradition of both State and religious interest and support characterised provision for education on the island of Ireland from the 1700s. Following the partition of Ireland in the 1920s, the newly created political entities of the Irish Free State and Northern Ireland forged separate and distinct education policy trajectories that largely reinforced and propagated the dominant identity in each jurisdiction. This article explores and assesses the contributions of the first Ministers for Education in the Irish Free State and in Northern Ireland in the 1920s, Eoin MacNeill and Lord Londonderry, respectively. A particular emphasis is placed on their influence, impact and legacy on primary education policy development and enactment. Ultimately it could be argued that both Ministers can be characterised to a certain extent as political failures in terms of introducing and embedding education policy that aligned with their personal or political ambition and ideology.