Duliajan Oil Town should not be confused with Duliajan.
| Duliajan Oil City | |
| Nickname: | Duliajan |
| Settlement Type: | City |
| Pushpin Map: | India Assam#India |
| Pushpin Label Position: | left |
| Pushpin Map Caption: | Location in Assam, India |
| Coordinates: | 27.3617°N 95.3183°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Assam |
| Subdivision Type2: | District |
| Subdivision Name2: | Dibrugarh |
| Unit Pref: | Metric |
| Population Total: | 21707 |
| Population As Of: | 2001 |
| Population Rank: | 16th in Assam |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Assamese |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Registration Plate: | AS |
Duliajan Oil City is a census town in Dibrugarh district in the state of Assam, India. It is the headquarters of Oil India Limited, a PSU undertaking of crude petroleum and Oil industry.
India census,[1] Duliajan Oil Town had a population of 21,707. Males constitute 53% of the population and females 47%. Duliajan Oil Town has an average literacy rate of 84%, higher than the national average of 59.5%: male literacy is 87% and, female literacy is 80%. In Duliajan Oil Town, 10% of the population is under 6 years of age.