| Erlang Township | |
| Native Name: | 二郎乡 |
| Native Name Lang: | zh-cn |
| Settlement Type: | Township |
| Pushpin Map: | China Gansu |
| Pushpin Map Caption: | Location in Gansu |
| Coordinates: | 33.8375°N 105.5953°W |
| Subdivision Type: | Country |
| Subdivision Name: | People's Republic of China |
| Subdivision Type1: | Province |
| Subdivision Name1: | Gansu |
| Subdivision Type2: | Prefecture-level city |
| Subdivision Name2: | Longnan |
| Subdivision Type3: | County |
| Subdivision Name3: | Cheng County |
| Subdivision Type4: | Village-level divisions |
| Subdivision Name4: | 10 villages |
| Unit Pref: | Metric |
| Population Density Km2: | auto |
| Timezone1: | China Standard |
| Utc Offset1: | +8 |
| Postal Code Type: | Postal code |
Erlang Township is a township of Cheng County, Gansu province, China.[1], it administers the following ten villages:[2]