Straffan is a village in County Kildare, Ireland, situated on the banks of the River Liffey, 25 km upstream of the Irish capital Dublin. As of the 2016 census, the village had a population of 853, a nearly two-fold increase since the 2006 census. Straffan is the name of the surrounding electoral division which is within the Celbridge Number 1 Rural Area, and which had a population of 1,449.