Loujain al-Hathloul (Arabic: لجين الهذلول Lujjayn al-Hadhlūl; born 31 July 1989) is a Saudi women's rights activist, a social media figure, and political prisoner.

In May 2018, she and several prominent women's rights activists were kidnapped in the United Arab Emirates (UAE) and deported to Saudi Arabia where they were charged with "attempting to destabilise the kingdom."

[15] On 1 December 2014, she was arrested and detained for 73 days after an attempt to cross the border in her car from the UAE to Saudi Arabia, on charges related to defying the female driving ban in the kingdom.

The reason for the arrest was not officially disclosed, although Amnesty International believed it was for her human rights activism, and al-Hathloul was not allowed access to a lawyer or any contact with her family.

[27] Al-Hathloul was detained again on the eve of 15 May 2018, along with Eman al-Nafjan, Aisha al-Mana, Aziza al-Yousef, Madeha al-Ajroush and some men[28][15][29] involved in campaigning for women's rights in Saudi Arabia.

[38] On 1 March 2019, the office of Saudi Arabia's public prosecutor announced that the preliminary investigation had been completed and they would be preparing to try al-Hathloul and other activists in court for undermining state security.

[43] On 11 August 2020, her other sister Lina al-Hathloul (a Nobel Peace Prize-nominated campaigner), expressed fear about the possibility of the activist being tortured again in the Saudi prison, as she has not been heard from for over 60 days.

Highlighting the situation of these dissidents and migrants in the country's detention centers, the MEPs also urged the European Union states to cut down their representation at Saudi's G20 Summit.

[48] According to Hathloul's sisters, Lina and Alia, who broke the news on Twitter, the activist started her hunger strike on 26 October 2020 against the al-Hair prison administration, demanding regular contact with her family and siblings.

[52] On 29 November 2020, seven European envoys released a joint statement condemning the continued detention of five women's rights activists, including Loujain al-Hathloul, whose case was referred to a special court for terrorism-related offences.

Technical information uncovered by Citizen Lab allowed Apple to warn thousands of its users, including U.S. State Department employees in Uganda.

[57] In December 2021, al-Hathloul announced she and the Electronic Frontier Foundation would be suing three former American intelligence officers, Marc Baier, Ryan Adams, and Daniel Gericke, for hacking her communications devices, leading to her kidnapping in the UAE and deportation to Saudi Arabia.