Lennon Wall (Chinese: 連儂牆; Jyutping: lin4 nung4 coeng4), in the Hong Kong context, originally referred to the mosaic wall created during the Umbrella Movement,[1] located at Central Government Complex, Harcourt Road, Admiralty. The wall is one of the major artworks of the Umbrella Movement as a collective artistic work of spontaneous free expression, demanding democracy in the elections of the territory's top leaders.

It was a space of encouragement and solidarity, full of colourful Post-It notes (more than ten thousand pieces) with messages advocating for freedom, democracy and universal suffrage. Post types included epigrams, lyrics, poems, foreign words and hand-drawn graphics. During the 2014 Umbrella Movement protests, there were coordinated preservation efforts to digitally document the wall and related protest art.[2][3][4]

After over two months of occupy actions by democracy activists, most of the artworks were removed from original positions prior to police clearance operations. Many protesters and citizens have tried to re-create some of the artworks, especially the Hong Kong Lennon Wall.[5][6]

During the 2019–2020 Hong Kong protests, new Lennon Walls appeared in numerous locations across the territory, typically near transport interchanges.