The Fellowship of Saint Alban and Saint Sergius is a Christian society founded in 1928 to foster contact between Christians, especially those of the Anglican and Orthodox traditions. It is named in honor of Saint Alban, the Christian protomartyr of Britain, and Saint Sergius of Radonezh, a patron saint of Russia. It publishes the periodical Sobornost, edited for thirty years by Sergei Hackel, and arranges an annual conference. Its headquarters are currently at Oxford in Britain, and it has branches elsewhere in Britain and in Bulgaria, Denmark, Greece, Romania, Russia and Sweden.
Nicholas Zernov and his wife Militza wrote The Fellowship of St Alban and St Sergius: a Historical Memoir in 1979 to commemorate the 50th anniversary of the Fellowship.