Diana Iovanovici Șoșoacă (born 13 November 1975) is a Romanian lawyer, activist, and far-right politician. Șoșoacă rose to prominence as an anti-vaccine activist during the COVID-19 pandemic. She has served as a Member of the European Parliament (MEP) for S.O.S. Romania since her election in 2024.

Șoșoacă was elected to the Senate of Romania in the 2020 election as a member of the Alliance for the Union of Romanians (AUR). She was later excluded from the party's parliamentary caucus, and joined S.O.S. Romania in 2023. She served in the Senate until her election to the European Election in 2024. Șoșoacă was barred from running for President of Romania in the 2024 election by the Constitutional Court.

Diana Iovanovici Șoșoacă was born on 13 November 1975 in Bucharest, Romania. Her paternal grandparents were from Skopje, modern North Macedonia; Șoșoacă has stated that "half of me is from Skopje". Her paternal grandparents and their whole family migrated to Romania. According to Șoșoacă, an aunt of hers was imprisoned for opposing the Romanian communist regime. Șoșoacă's mother is Alice Florescu Bleotu, a gynecologist and specialist in esotericism. Șoșoacă was married to Dumitru Silvestru Șoșoacă, who was her third husband.

Details about her studies are scarce. Some sources claim she obtained a law degree from the Romanian-American University in Bucharest, and then worked for Eugen Dijmărescu [ro], Minister of Commerce in the Năstase cabinet. According to her own recounting, she studied law at the University of Bucharest, at the urging of an uncle who was president of the Prahova County Tribunal.

Șoșoacă gained notoriety in Romania in 2020 during the COVID-19 pandemic, by protesting restriction measures on social media. She went on to become one of the main anti-vaccine figures in Romania.

On 21 December 2020, she was elected to the Senate of Romania for the Iași County as a member of Alliance for the Union of Romanians (AUR). She later said that she did not want to enter the Parliament of Romania, but that she was forced by other people who pressured her.

On 10 February 2021, she was excluded from AUR's parliamentary group after AUR members Claudiu Târziu and Sorin Lavric proposed her exclusion for not following the party's strategy. Subsequently, on 30 May 2022, she joined S.O.S. Romania, a party founded in November 2021.

Șoșoacă also supports a Romanian withdrawal from the European Union. She holds anti-immigration views. She was fined for hate speech against Syrian-born Romanian physician and politician Raed Arafat.

Șoșoacă has also been recurrently criticized in Romanian media for her ties with Russia. The Russian state-controlled Sputnik news agency labeled her "the politician of the year 2021 in Romania". Furthermore, in March 2022, in the midst of the Russian invasion of Ukraine, Șoșoacă together with 3 other MPs met with the Russian ambassador in Bucharest to discuss a "memorandum related to the Peace of Bucharest" and Romania's "neutrality" in the context of the invasion. This meeting had not been approved for representation by the Parliament leadership and one of the MPs, PSD member Dumitru Coarnă, was expelled from his party shortly afterwards.

Additionally, Șoșoacă was appreciated by Killnet (a pro-Russia hacking group which launched in 2022 a series of cyberattacks on multiple Romanian websites), after she said that Romania must not get involved in the war in Ukraine. In March 2023, she proposed a law project on the Romanian Parliament for the annexation by Romania of Northern Bukovina, the Hertsa region, Budjak, Northern Maramureș and Snake Island from Ukraine, as they were "historical territories" that belong to Romania as stated in the law project. In retaliation, Ukraine announced it would impose sanctions against Șoșoacă, labeling her as a threat to Ukrainian national security.

On 21 November 2023, Diana Șoșoacă interrupted a secret session of the Parliament of Romania, during which footage of the Israel–Hamas war was presented, screaming "Palestine". She later took a soft pro-Palestine stance during the conflict, stating that Romania should be neutral and mediate the conflict, that Hamas does not represent all Palestinians and that Israel is also committing war crimes. During a Romania-Israel friendship day event in the Romanian Parliament, she is alleged to have shouted "Long live the Guard" in protest, in reference to the Iron Guard.

In June 2024, Șoșoacă was elected as a member of the European Parliament. She suggested that the Parliament should be "blessed" and "purified" by a priest. On the first day of the Strasbourg Plenary, Șoșoacă wore a muzzle over her face as a sign of dissent during Ursula von der Leyen's opening speech. Later, she loudly protested when French MEP Valérie Hayer suggested that abortion rights be included in the EU Charter of Fundamental Rights. After interrupting Hayer's speech several times, she was escorted outside the chamber.

Șoșoacă intended to run for President of Romania in the 2024 election. However, she was barred from running by the Constitutional Court, which removed her name from the list of candidates on the November 2024 ballot. In response, she claimed "[t]his proves the Americans, Jews and the European Union have plotted to rig the Romanian election before it has begun". The court's ruling, which was split 5–2 along party lines, was criticized by some for being politically motivated, including by the National Liberal Party, which announced it was ending its governing coalition with the Social Democratic Party as a result.

On 12 December 2021, Șoșoacă was interviewed by Italian reporter Lucia Goracci who was investigating the anti-vaccine movement for Rai 1. After a very tense exchange, Șoșoacă locked the door of her apartment and called the police, claiming that someone had entered her office.

Once police had arrived, Șoșoacă insisted to have all of Goracci's footage deleted. Goracci said that she and her crew had been held captive by the senator and that she had been punched by Șoșoacă's husband without the police intervening. The stalemate ended after eight hours, following an intervention by the Italian embassy.

In February 2023, she falsely accused the United States of causing the Turkey–Syria earthquakes with a seismic weapon. Șoșoacă used Facebook to spread fake news on the matter, using footage from 2009 falsely claiming to be from 2023.

Police officers from Ilfov County announced that they are investigating and opening a criminal case according to emergeny ordinance no. 31/2002 after several people, including Șoșoacă, commemorated Iron Guard leader Corneliu Zelea Codreanu at a wayside cross in Tâncăbești. Some of the participants raised their hands in the Hitler salute.