|• Member of Legislative Assembly||Rajeev Ranjan|
|Elevation||63 m (207 ft)|
|• Official||Magadhi, Hindi|
|Time zone||IST (UTC+5:30)|
Islampur is located at  It is situated 65 km (40 mi) from Patna, the capital of Bihar state. It has an average elevation of 63 m (207 ft)..
Islampur is not categorized as a city; politically and demographically it lies between a town and a village, and is therefore called a notified area. It has a municipal council, called Nagar Palika in India, and is also known as Islampur Nagar Panchayat.
Islampur is well connected to Patna, the state capital, by roads and railway lines. Islampur had a narrow gauge railway line since 1922, which was recently converted to a broad gauge line. Islampur is connected directly to New Delhi by the Magadh Express. A new train, the [Hatia-Rajendra Nagar-Islampur] Intercity Express, is also running. Currently two express trains and two passenger trains (Patna-Islampur and Buxur-Islampur Fast Passenger) run on this track. It is also well connected from Gaya Rajgir and Biharshariff by road.
As of 2001[update] India census, Islampur had a population of 29,855. Males constitute 53% of the population and females 47%. Islampur has an average literacy rate of 89% : male literacy is 96%, and female literacy is 82%. In Islampur, 19% of the population is under 6 years of age. With economic growth, new businesses are setting up in the area. Vehicle dealerships have opened and a four-lane highway is under construction to Rajgir. Durga Puja is the most popular Hindu ritual festival.
Delhi Darbar is a tourist attraction. It is an old building similar to the Red Fort in Delhi. The original construction dates from 1345 CE and took around 20 years. It was the work of a local zamindar, Chaudhary Jahur, who ordered some sections to be destroyed and rebuilt during the process. Also on the 20 acres (8.1 ha) site are the Prani Masjid, the 52-room Bawan Kothri, and the Tirpan Darwaja. The main building was never completed in part because of Jahur's vacillation.
- Falling Rain Genomics, Inc – Islampur
- "Census of India 2001: Data from the 2001 Census, including cities, villages and towns (Provisional)". Census Commission of India. Archived from the original on 2004-06-16. Retrieved 2008-11-01.