The Latvian lats was the currency of Latvia from 1922 until 1940 and from 1993 until it was replaced by the euro on 1 January 2014. A two-week transition period during which the lats was in circulation alongside the euro ended on 14 January 2014. The lats is abbreviated as Ls and was subdivided into 100 santīmi, abbreviated as an s after the santīm amount.

Latvia replaced its previous currency, the lats, with the euro on 1 January 2014, after a European Union (EU) assessment in June 2013 asserted that the country had met all convergence criteria necessary for euro adoption. The adoption process began 1 May 2004, when Latvia joined the European Union, entering the EU's Economic and Monetary Union. At the start of 2005, the lats was pegged to the euro at Ls 0.702804 = €1, and Latvia joined the European Exchange Rate Mechanism, four months later on 2 May 2005.