| Country: | CHN |
| Map: | Shanghai S19 map.svg |
| Province: | Shanghai |
| Type: | S |
| Route: | 19 |
| Alternate Name: | Xinwei Expressway 新卫高速公路 |
| Length Km: | 18.96 |
| Length Ref: | [1] |
| Terminus A: | in Xinnong, Jinshan District |
| Terminus B: | in Jinshanwei, Jinshan District |
| Previous Type: | S |
| Previous Route: | 7 |
| Next Type: | S |
| Next Route: | 20 |
The Xinnong–Jinshanwei Expressway, commonly referred to as the Xinwei Expressway and designated S19, is a 18.96adj=midNaNadj=mid in Shanghai, China. It runs entirely within Jinshan District, between the towns of Xinnong to the north and Jinshanwei to the south, which give the expressway its name. It was formerly designated as A6.[2]
The Xinnong–Jinshanwei Expressway is a north-south expressway located entirely in Jinshan District. It begins at the Xinnong Interchange, an interchange with G1501 Shanghai Ring Expressway to the north and east and S36 Tinglin–Fengjing Expressway to the west. It proceeds south to an interchange with G15 Shenyang–Haikou Expressway near Jinshanwei. A short segment of the expressway continues beyond the interchange to a toll booth, where the expressway terminates and becomes Xinwei Highway.