Kenneth Sidney Coates (16 September 1930 – 27 June 2010) was a British politician and writer.
He chaired the Bertrand Russell Peace Foundation and edited The Spokesman, the BRPF magazine launched in March 1970.
He was a Labour Party Member of the European Parliament from 1989 to 1998 until his expulsion, and then an independent member of GUE/NGL from 1998 to 1999.