| Siddharthnagar | |
| Other Name: | Naugarh |
| Settlement Type: | City |
| Pushpin Map: | India Uttar Pradesh#India3 |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Uttar Pradesh, India |
| Coordinates: | 27.3005°N 83.0945°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Uttar Pradesh |
| Subdivision Type2: | District |
| Subdivision Name2: | Siddharthnagar |
| Established Date: | 13 MAY 1989 |
| Government Type: | Democracy |
| Governing Body: | Municipal Board |
| Leader Title3: | District Magistrate |
| Leader Name3: | Mr. Pavan Agarwal (IAS)[1] |
| Unit Pref: | Metric |
| Population Total: | 25,422 |
| Population As Of: | 2011 |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Hindi |
| Demographics1 Title2: | Regional |
| Demographics1 Info2: | Bhojpuri, Awadhi |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code Type: | PIN |
| Postal Code: | 272207 |
| Area Code Type: | Telephone code |
| Area Code: | 05544 |
| Registration Plate: | UP-55 |
| Blank1 Name Sec1: | Nearest city |
| Blank1 Info Sec1: | Gorakhpur, Basti |
Siddharthnagar also known as Naugarh is a city and the district headquarters of Siddharthnagar in Uttar Pradesh, India.[2] It is one of the five Vidhan Sabha constituencies in Siddharthnagar district, though the constituency has been renamed to Kapilvastu, and is near Lumbini, Nepal the birthplace of Gautam Buddha. It is north of Siddharthnagar railway station 20 kilometers from India.
India census the total population of Siddharthnagar city was 23,97,051. Males accounted for about 53% (12,11,347) and females 47% (11,85,704) of the total population.[3] [4]
Siddharthnagar railway station is located on the way to Gorakhpur from Gonda. The city also has a bus station and is connected to Gorakhpur via National Highway 730 and also connected with Basti via National Highway 28.