Arnon Nampa is a Thai human rights lawyer and activist. He has openly criticized the monarchy of Thailand, which is controversial in the country. He was initially regarded as a prominent human rights defender during his tenure as a human rights lawyer and later accumulated multiple criminal charges due to his active involvement in pro-democracy activism. He is one of the leading figures of the 2020–2021 Thai protests, co-leading reforms to the monarchy reform movement by non-elite people for first time in Thai history.

In Thailand, protests began in early 2020 with demonstrations against the government of Prime Minister Prayut Chan-o-cha. They later expanded to include the unprecedented demands for reform of the Thai monarchy. The protests were initially triggered by the dissolution of the Future Forward Party (FFP) in late February 2020 which was critical of Prayut, the changes to the Thai constitution in 2017, and the country's political landscape that it gave rise to.