Socialist Worker is the name of several far-left newspapers currently or formerly associated with the International Socialist Tendency (IST). It is a weekly newspaper published by the Socialist Workers Party (SWP) in the United Kingdom since 1968, and a monthly published by the International Socialists in Canada. It was a monthly (and daily web site) published by the International Socialist Organization (ISO) in the United States from 1977–2019, and a biweekly published by the Socialist Workers Party in Ireland, a quarterly published by the International Socialist Organisation in Zimbabwe and a monthly published by the former International Socialist Organisation in Australia. Socialist Worker was also the name of an IST political group in New Zealand.