Tullow (Irish: An Tulach, meaning "The Mound", formerly Tulach Ó bhFéidhlim) is a town and village in County Carlow, Ireland. It is located on the River Slaney where the N81 road intersects with the R762.

There is a statue of Father John Murphy, one of the leaders of the 1798 Rebellion, who was captured near Tullow and executed in the Market Square on 2 July. There is a small museum with information about this period and other local history.

Saint Patrick's are the GAA club in Tullow who currently compete in the Carlow Senior Football Championship and have been crowned champions on ten occasions. They also compete in the Carlow Intermediate Hurling Championship.

Parkville United who play at Hawkins Lane Tullow compete in the Carlow premier division.

There is quote in Brendan Behan's, Borstal Boy that mentions Tullow: "Littlewood was twenty and married. We thought he was as old as the Hills of Tullow."

The town was at one time connected to the Irish railway network, on a branch line from Naas in County Kildare. Tullow railway station opened on 1 June 1886, closed for passenger and goods traffic in 1947 and finally closed on 1 April 1959.