This segment of the timeline of the 2019–2020 Hong Kong protests covers the month of July 2019. The anniversary of the 1997 handover of Hong Kong to China on 1 July saw large daytime protests. In the evening of that day, protesters stormed the Legislative Council Building and defaced symbols, with police only moving in after midnight. This incident, which was sharply condemned by the government of Carrie Lam, did however not lead to a split between peaceful and violent protesters. Observers linked the understanding of the non-violent protesters for the violent wing to the lack of willingness of the Lam government to engage in dialogue about the protesters' five demands. Apart from major protests on Sundays, there were also mostly peaceful demonstrations during the week.

The 2019 Yuen Long attack, also known as the 721 incident, or 721 821, refers to a mob attack that occurred in Yuen Long, a town in the New Territories of Hong Kong, on the evening of 21 July 2019. It took place in the context of the 2019–2020 Hong Kong protests. A mob of indigenous Yuen Long villagers dressed in white, claiming to protect Yuen Long against protestors stormed the MTR's Yuen Long station. and allegedly caused 45 injuries, which included protesters returning from a demonstration in Sheung Wan on Hong Kong Island, journalists and lawmakers.