Nanjing Metro is an urban rail transit system serving Nanjing, Jiangsu Province, China, and the surrounding Nanjing Metropolitan Area. Its origins can be traced back to the Jing-Shi Railway constructed in the 33rd year of the Guangxu reign of the Qing Dynasty (1907). It is a member of the Community of Metros (CoMET).
As of December 2025, Nanjing Metro has 13 operational lines, including Lines 1, 2, 3, 4, 5, 7, 10, S1, S3, S6, S7, S8, and S9. All lines use a metro system, comprising 267 stations (with interchange stations counted multiple times) and a total network length of 525 kilometers. This forms a metro network covering all 11 districts of Nanjing as well as Jurong City.
