Oyinkan Braithwaite is a Nigerian-British novelist and writer, born in Lagos in 1988. She spent her childhood in both Nigeria and the UK. Braithwaite is best known for her debut novel My Sister, the Serial Killer.

She is a graduate of Creative Writing and Law from Kingston University. Following her degree, she worked as an assistant editor at Kachifo, a Nigerian publishing house, and has been freelancing as a writer and editor since. In 2014, she was shortlisted as a top-ten spoken-word artist in the Eko Poetry Slam, and in 2016 she was a finalist for the Commonwealth Short Story Prize. Oyinkan Braithwaite currently lives in Lagos, Nigeria.