Street poster art is a kind of graffiti, more specifically categorized as "street art". Posters are usually handmade or printed graphics on thin paper. It can be understood as an art piece that is installed on the streets as opposed to in a gallery or museum, but by some it is not comprehended as a form of contemporary art.

Viral diffusion of messages and the ability to reach every part of society are core concepts for street poster artists.^[1]

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  Nakameguro, Tokyo, Japan
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  Graffiti in Lima, Peru (2014)
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  Mural, Porto
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  Work of Brazilian artists Os Gêmeos, in Lisbon, Portugal (2011)
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  Street art by WATTTS in Paris
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  Painting in the Global Tradition by Ces53, a Dutch street artist
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  Street art in Sesimbra, Portugal
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  Graphic-Domain in Heidelberg by Nicola Pragera
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  Mural by BLU, Gaza Strip, Prague
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  Graffiti in Shoreditch, London by Stik
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  Urban art in Katowice, Poland
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  Street art in the old city of Prizren, Kosovo
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  Mural painting "Propagating machine" realized by Nevercrew in Mannheim, Germany in 2017.
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  Work by Bleepsgr in Athens
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  Lie Lie Land by female street artist Bambi in Islington, London.
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  Street artist (chalks) in Florence, Italy
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  Mural on the wall of Dunedin's Southern Cross Hotel

• E Pluribus Venom by Shepard Fairey (2008) Gingko Press.
• Philosophy of Obey (Obey Giant): The Formative Years (1989 - 2008), edited by Sarah Jaye Williams (2008), Nerve Books UK.
• Obey: Supply & Demand, The Art of Shepard Fairey by Shepard Fairey (2006), Gingko Press.
• Popaganda: The Art and Crimes of Ron English by Ron English(2004) Last Gasp
• RE/Search: Pranks 2 by V Vale(2006) RE/Search Publications