The Young Fabians is the under age 31 section of the Fabian Society, a socialist society in the United Kingdom that is affiliated with the Labour Party (UK). The Young Fabians operate as a membership-driven think tank that organises policy debates, research projects, publications, conferences, and international delegations. The organisation holds no collective position on policy.

The Fabian Society is a British socialist organisation whose purpose is to advance the principles of social democracy and democratic socialism via gradualist and reformist effort in democracies, rather than by revolutionary overthrow. The Fabian Society was also historically related to radicalism, a left-wing liberal tradition.