statesman and one of the leaders of the Belgian Revolution of 1830 (1830, Revolutions of) that resulted in an independent Belgian kingdom. The foremost Liberal leader in the first four decades of the kingdom's existence, he served as prime minister in 1847–52 and 1857–67.

Rogier worked as a lawyer in Liège and in 1824 helped found Mathieu Laensbergh (later Le Politique), a journal that became prominent for its advocacy of Belgian patriotism. When the Belgian rebellion against the Dutch-dominated Kingdom of the United Netherlands broke out in Brussels in August 1830, he led an armed group of Liègeois in support and emerged as a leader in the revolt. He became a principal member of the provisional government the following month and arranged an armistice with the Dutch at Antwerp. As a member for Liège of the new National Congress, he backed a proclamation of Belgian independence and helped Leopold of Saxe-Coburg become the first king of the Belgians as Leopold I in June 1831.

After acting as governor of Antwerp (1831–32), Rogier served as minister of the interior (1832–34) and sponsored a bill for construction of a national railway system, the first in Europe and a key bulwark of the nation's economic recovery. Kept out of office by Roman Catholic opposition between 1841 and 1847, he became prime minister in August 1847 after a decisive electoral victory. His electoral reform law (1848) helped save Belgium from the revolutionary unrest experienced by other European nations in 1848.

Rogier's education bill of 1850 created an alternative school system to the existing Roman Catholic system. His government's financial policy was guided by the forceful Walthère Frère-Orban (Frère-Orban, Walthère), who later became prime minister. In his second ministry (1857–67), Rogier's envoy August Lambermont (Lambermont, Auguste, Baron) settled the long-disputed Scheldt Question, freeing Antwerp's maritime commerce. Rogier retired in favour of Frère-Orban in 1867 but remained prominent in public affairs throughout the 1870s.