Sallins /ˈsælɪnz/ (Irish: Na Solláin) is a town in County Kildare, Ireland, situated 3.5 km north of the town centre of Naas, from which it is separated by the M7 motorway. Sallins is the anglicised name of Na Solláin which means "the willows".

In the Central Statistics Office census of 2022, Sallins had a population of 6,269, more than double the 2,922 recorded in the 2002 census. It is the tenth largest settlement in Kildare and the 80th largest in Ireland. Sallins grew as a result of its position on both the Grand Canal and the Dublin to Cork railway line. Historically, the town's major employers were Odlums Flour Mills and a meat factory, both of which have now closed.

Theobald Wolfe Tone is buried near Sallins in Bodenstown graveyard. Each summer, Irish republicans of various political and paramilitary groupings congregate at Sallins to hold commemorations at Tone's grave.

Sallins developed as a village with the opening of the Grand Canal to traffic in 1779 and a passenger service in 1780.

In the last decades of the 19th century and the early 20th century, Sallins was a popular spot for visitors to the grave of Wolfe Tone to gather before marching to the gravesite. Many visitors would take the train from Dublin to Sallins and walk the 2.5 km to Tone's grave in Bodenstown.

The Church of Our Lady of the Rosary and the Guardian Angels, a prefabricated "tin tabernacle" Catholic church, was built in 1924.

On 31 March 1976, a Cork to Dublin mail train was robbed and approximately £200,000 was stolen at a small farm crossing on the main train line near Sallins.

In the 1990s and 2000s, Sallins became a commuter town of Dublin. The population grew significantly, increasing sevenfold between 1996 and 2022.