An Nás (; Irish: "Nás na Ríogh" or "An Nás" ) is the county town of County Kildare, Ireland. With a population of over 23,000 it is the largest town in the County of Kildare. It is a major commuter belt town, with many people living in Naas and working in Dublin. The nearby M7 motorway, which bypasses Naas and connects Dublin to the South and Southwest, is one of the busiest routes in the country.