​IRBIT, a town of Russia, in the government of Perm, 110 m. N.E. of Ekaterinburg, and on the Irbit river. Pop. (1860) 3408, (1897) 20,064. It is famous for a great fair, held since 1643, which lasts from the 1st of February to the 1st of March (O.S.), and at which are sold (to an average annual value of over £4,000,000) cottons, woollens, flax and hemp, silks, leather, metals, metallic and other manufactured goods, furs, hides, felt, raw wool and tea.