Sudargas is a village located in Šakiai district, west Lithuania.

In 1724, Jonas Mikalojus Radvila, secured the rights of the town from the Grand Duke of Lithuania, and was allowed to have a market and to organise two fairs.

On 12 May 1792, Stanisław II August granted the town rights and coat of arms.

In 19th century, Sudargas was an important centre of book smuggling, with a large flow of printed materials passing through the parish priest Martynas Sederevičius.

At the end of the 19th century, it is mentioned as a settlement of Naumiestis county in the Kiduliai parish.