George-Nicolae Simion (Romanian: [ˈdʒe̯ordʒe nikoˈla.e simiˈon]; born 21 September 1986) is a Romanian far-right politician and civic activist. He is the founder and chairman of the Alliance for the Union of Romanians (AUR), the second largest party in both houses of parliament since 2024. He was a candidate in the 2025 Romanian presidential election.

Simion completed his high school studies at the Gheorghe Lazăr National College, before studying business administration at the University of Bucharest and then graduating from Alexandru Ioan Cuza University with a master's degree in history. Following his studies, he began campaigning for the unification of Moldova and Romania, and has since set up notable associations and events for this purpose, such as Action 2012, the Alliance for the Centenary and the Centenary March. As a result of his agitation campaigns, he has been prohibited from entering Moldova on several occasions in the past, and he is currently barred from entering the country as a persona non grata.

In 2019, Simion began to participate in politics, running as an independent candidate for the 2019 European Parliament election in Romania, in which he obtained 117,141 votes. After this, the AUR party was founded on 19 September 2019. The AUR garnered national and international attention after its unexpectedly high vote share in the 2020 Romanian parliamentary election.

Simion has been involved in several controversies, notably AUR's support for two former military officers who had allegedly repressed revolutionaries in the 1989 Romanian Revolution entering the Romanian Parliament or his participation in the Valea Uzului ethnic conflict [ro].

Simion ran as the AUR candidate in the May 2025 Romanian presidential election, winning the first round, but ultimately losing the runoff to Nicușor Dan.

George-Nicolae Simion was born on 21 September 1986 in Focșani, the capital of Vrancea County, in the Socialist Republic of Romania. He is the second of two children born to Constantin Simion from Ialomița and his wife from Vrancea, the other being his elder sister Elena. At an early age, the family moved to the Romanian capital Bucharest, where his parents, both economists, had met when studying at the Bucharest Academy of Economic Studies. Romanian Development Bank.

Constantin suffered from alcoholism and was involved in numerous police confrontations. Simion was thus largely raised in the care of his mother. In 1995, at the age of nine, Simion attended the opening of Romania's first McDonald's restaurant, an event he later reflected upon as among the formative ones in his perceptions of capitalism's influence on post-Communist Romanian society.

He completed his secondary education at Gheorghe Lazăr National College in Bucharest, graduating in 2005. He then studied at the Faculty of Business and Administration at the University of Bucharest, where he obtained his bachelor's degree in 2008. In 2010, he completed a master's degree in history at Alexandru Ioan Cuza University in Iași, located in the historical region of Moldavia, with "the crimes of communism" as his research topic. During his academic years, Simion actively participated in student organisations that promoted Romanian history and cultural heritage.