| Jiji Weir | |
|---|---|
 | |
_location_map.svg)  Location of Jiji Weir in Nantou County | |
| Official name | 集集攔河堰 |
| Location | Nantou County, Taiwan |
| Coordinates | 23°49′05.7″N 120°45′47.3″E / 23.818250°N 120.763139°E |
| Purpose | water supply |
| Status | Operational |
| Construction began | July 1990 |
| Opening date | December 2001 |
| Dam and spillways | |
| Impounds | Zhuoshui River |
The Jiji Weir (traditional Chinese: 集集攔河堰; simplified Chinese: 集集拦河堰; pinyin: Jíjí Lán Héyàn) is a weir located in Nantou County, Taiwan. The weir is located at the border of three townships in the county, which are Jiji Township, Lugu Township and Zhushan Township.