Qaleh Now District () is in Ray County, Tehran province, Iran. Its capital is the city of Qaleh Now-e Khaleseh.
In 2012, Qaleh Now Rural District and portions of Kahrizak Rural District were separated from Kahrizak District in the formation of Qaleh Now District.
The village of Qaleh Now-e Khaleseh was converted to a city in 2018.
At the time of the 2016 census, the district's population was 38,009 inhabitants in 8,147 households.