Altyn (Russian алты́н, also алты́нник) is a historical Russian currency (symbol: ). The name seems similar to Tatar altın, (алтын) meaning "gold", but this interpretation contradicts its more recent Russian history as a small three kopek silver, then copper, coin. Igor Spassky, a Russian coin collector, proposed a different hypothesis: according to him, the name was derived from the Tatar altı, (алты) meaning "six", since 1 altyn was equal to 6 dengas.
Altyn coins were minted from 1654 under Alexis I, under Peter I as silver coins from 1704 to 1718, and under Nicholas I as copper coins with a value of three kopeks from 1839. Production of three kopek coins was discontinued in 1991. A kopek is analogous to a Western penny.