Sugauli is a city and a notified area in East Champaran district in the Indian state of Bihar.

Best known for Treaty of Sagauli, 1816 between the British and Gurkhas and role played in the Satyagraha Movement of Mahatma Gandhi, it is also the setting for Rudyard Kipling's story "Rikki-Tikki-Tavi" (spelled as "Segowlee" in said story), and the place where a treaty was signed with Nepal in 1816.

Sugauli is a Nagar Panchayat city in district of Purbi Champaran, Bihar.

The Sugauli city is divided into 20 wards for which elections are held every 5 years.

The Sugauli Nagar Panchayat has population of 38,815 of which 20,584 are males while 18,231 are females as per report released by Census India 2011.

In Sugauli Nagar Panchayat, Female Sex Ratio is of 886 against state average of 918.

Moreover, Child Sex Ratio in Sugauli is around 937 compared to Bihar state average of 935.

Literacy rate of Sugauli city is 64.90% higher than state average of 61.80%.

Sugauli Nagar Panchayat has total administration over 7,480 houses to which it supplies basic amenities like water and sewerage.

It is also authorized to build roads within Nagar Panchayat limits and impose taxes on properties coming under its jurisdiction.

Sugauli is the part of SATYAGRAHA movement what GANDHI JI has started from the Champaran, and that movement inspired a lot of youth at that time to contribute for the nation and few of them were Janardan Pandey and Babulal Mishra from Sugauli, Late Pt.

Some of important villages are as follows: Chhapwa: It connects Motihari with Bettiah via NH 28, Sugaon : Earlier it was a capital of Tirhut region (as per Gazetteer),Bhathan, Phulwaria, Panjiyarwa, Karmwa and many small villages.

Direct trains are available to all the major destinations across India like Patna, Delhi, Mumbai, Kolkata, Guwahati, Ahemdabad, Lucknow, Jaipur, Jammu & Katra, etc.

The National Highway Authority of India (NHAI) has notified a new Patna-Bettiah road as National Highway 139W, setting the state for construction of a high-quality four-lane road between the two towns that would reduce the distance between them to 167 kilometres from the current 200-odd km and travel time to around two hours.

The nearest airport in bihar is Jay Prakash Narayan International Airport located in Patna which is about 200 km (120 mi) via Muzaffarpur and 177 km (110 mi) via areraj.