| Dayu | |
| Native Name: | 大豫镇 |
| Native Name Lang: | zh-cn |
| Settlement Type: | Town |
| Pushpin Map: | China Jiangsu |
| Pushpin Label Position: | top |
| Pushpin Map Caption: | Location in Jiangsu |
| Coordinates: | 32.3092°N 121.2883°W |
| Subdivision Type: | Country |
| Subdivision Name: | People's Republic of China |
| Subdivision Type1: | Province |
| Subdivision Name1: | Jiangsu |
| Subdivision Type2: | Prefecture-level city |
| Subdivision Name2: | Nantong |
| Subdivision Type3: | County |
| Subdivision Name3: | Rudong County |
| Unit Pref: | Metric |
| Population Density Km2: | auto |
| Timezone1: | China Standard |
| Utc Offset1: | +8 |
| Postal Code Type: | Postal code |
Dayu is a town under the administration of Rudong County, Jiangsu, China.[1], it administers five residential communities: Dayu, Nankan (Chinese: 南坎), Dongling (Chinese: 东凌), Bingfang (Chinese: 兵房), Dayu Agricultural Farm Community (Chinese: 大豫镇农场社区), and the following sixteen villages:[2]