| Office3: | Secretary-General of the Romanian Government |
| Term Start3: | 7 December 2021 |
| Term End3: | 15 June 2023 |
| Predecessor3: | Tiberiu-Horațiu Gorun |
| Successor3: | Mircea Abrudean |
| President3: | Klaus Iohannis |
| Primeminister3: | Nicolae Ciucă Cătălin Predoiu (acting) |
| Office5: | Member of the Romanian Chamber of Deputies |
| Term Start5: | 2008 |
| Term End5: | 2016 |
| Constituency5: | Ialomița County |
| Office1: | Deputy Prime Minister of Romania |
| Term Start1: | 15 June 2023 |
| Primeminister1: | Marcel Ciolacu |
| President1: | Klaus Iohannis |
| Predecessor1: | Sorin Grindeanu Kelemen Hunor |
| Birth Date: | 27 May 1964 |
| Birth Place: | Coșereni, Romania |
| Otherparty: | PRO Romania (2019–21)[1] Greater Romania Party (until early 2000s)[2] [3] |
| Party: | Social Democratic Party (until 2019; since 2021) |
| Profession: | economist |
| Education: | University of Craiova[4] Dimitrie Cantemir Christian University Valahia University of Târgoviște[5] |
Marian Neacșu (born 27 May 1964) is a Romanian politician and former convict[6] [7] who was deputy in the Romanian Parliament in the 2008–2012 and 2012–2016 legislatures elected on behalf of the Social Democratic Party (PSD), Ialomița branch. Between 7 December 2021 and 15 June 2023 he was the Secretary-General of the Ciucă Cabinet. On 15 June 2023 he became Deputy Prime Minister in the Ciolacu Cabinet.
Neacșu was definitively sentenced to six months in prison with suspension for committing the crime of conflict of interest, in 2016. He illegally hired his daughter at his parliamentary office. This fact was brought back to public attention in November 2021,[8] when he was proposed and subsequently appointed as Secretary General of the Government.[9] On this occasion, Curentul claimed that in 2012 he facilitated the appointment of his wife in the position of general manager of the insurer PAID Romania, although he did not meet all the necessary conditions for this position.[10]