John Connolly was born in Dublin, Ireland in 1968 and has, at various points in his life, worked as a journalist, a barman, a local government official, a waiter and a dogsbody at Harrods department store in London. He studied English in Trinity College, Dublin and journalism at Dublin City University, subsequently spending five years working as a freelance journalist for The Irish Times newspaper, to which he continues to contribute.
He is based in Dublin but divides his time between his native city and the United States.