The 2019–2020 Hong Kong protests (also known by other names) were a series of demonstrations against the Hong Kong government's introduction of a bill to amend the Fugitive Offenders Ordinance in regard to extradition. It was the largest series of demonstrations in the history of Hong Kong.

The protests began with a sit-in at the government headquarters on 15 March 2019 and a demonstration attended by hundreds of thousands on 9 June 2019, followed by a gathering outside the Legislative Council Complex on 12 June which stalled the bill's second reading. On 16 June, just one day after the Hong Kong government suspended the bill, a larger protest took place to push for its complete withdrawal. The protest was also in response to the perceived excessive use of force by the Hong Kong Police Force on 12 June. As the protests progressed, activists laid out five key demands. Police inaction during the 2019 Yuen Long attack and brutality in 2019 Prince Edward station attack further escalated the protests.

Chief Executive Carrie Lam withdrew the bill on 4 September, but refused to concede to the other four demands. A month later, she invoked emergency powers to implement an anti-mask law, escalating the confrontations. The storming of the Legislative Council in July 2019, deaths of Chow Tsz-lok and Luo Changqing, one of whom was unarmed, and sieges of the Chinese University and the Polytechnic University in November 2019 were landmark events.