| Dulahazara Union | |
| Native Name: | ডুলাহাজারা ইউনিয়ন |
| Native Name Lang: | bn |
| Settlement Type: | Union Councils of Bangladesh |
| Pushpin Map: | Bangladesh |
| Pushpin Label Position: | Right |
| Pushpin Map Caption: | Location of Dulahazara in Bangladesh |
| Coordinates: | 21.6833°N 97°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Bangladesh |
| Subdivision Type1: | Division |
| Subdivision Name1: | Chittagong Division |
| Subdivision Type2: | District |
| Subdivision Name2: | Cox's Bazar District |
| Subdivision Type3: | Upazila |
| Subdivision Name3: | Chakaria Upazila |
| Leader Title: | Union Council Chairman |
| Leader Name: | Hasanul Islam Adar |
| Unit Pref: | Metric |
| Area Total Km2: | 39.6 |
| Population As Of: | 2011 |
| Population Footnotes: | [1] |
| Population Total: | 42,904 |
| Timezone1: | BST |
| Utc Offset1: | +6 |
| Postal Code: | 4741 |
| Website: | http://dulahazaraup.coxsbazar.gov.bd/ |
Dulahazara Union (bn|ডুলাহাজারা ইউনিয়ন) is a union, the smallest administrative body of Bangladesh, located in Chakaria Upazila, Cox's Bazar District, Bangladesh The total population was 42,904 in 2011.