Nira Cyril Chamberlain OBE CMath (born 17 June 1969) is a British mathematician based in Birmingham, UK.

[3] In 2014, he completed a PhD at Portsmouth University, under the supervision of Professor Andrew Osbaldestin entitled "Extension of the gambler's ruin problem played over networks".

[7] In 2012, Chamberlain was involved with the UK STEM Project "Being a Professional Mathematician", where his interview was selected for an iTunes podcast.

[13][14] Chamberlain regularly gives public lectures, discussing the significance of mathematics in human achievements and debating its relevance in everyday life.

[18] In 2018 he was awarded the title of "World's Most Interesting Mathematician" from the Big Internet Math Off run by the Aperiodical website.

[23] Chamberlain was appointed Officer of the Order of the British Empire (OBE) in the 2022 New Year Honours for services to mathematical sciences.