Jewar is a town and a nagar panchayat in Gautam Buddha Nagar district in the Indian state of Uttar Pradesh. Noida, Dadri and Jewar are the 3 sub-divisions of GB Nagar district, each headed by a SDM.

The ancient name of the town was Jáwáli, so called in honour of its founder the Brahmin sage Jaawali.

Before 1997, Jewar and Dankaur were parts of the Bulandshahr district. At present, Jewar and Dankaur along with Dadri and Bisrakh (earlier parts of Ghaziabad district) are parts of Gautam Buddha Nagar district.

Jewar is located at 28°07′N 77°20′E / 28.12°N 77.33°E / 28.12; 77.33. It has an average elevation of 195 metres (640 ft). It is located between 28.13° north latitude and 77.55° east longitude at an elevation of 195 metres (640 ft). It is on the northeast bank of the Yamuna River.

It is located in the outskirts of Greater Noida, the district headquarters. It is about 60 km (37 mi) from Noida, 40 km (25 mi) from Greater Noida, 33 km (21 mi) from Gautam Buddha University and 35 km (22 mi) from Khair.

As of 2011 Indian Census, Jewar had a total population of 32,269, of which 17,188 were males and 15,081 were females. Population within the age group of 0 to 6 years was 5,095. The total number of literates in Jewar was 18,184, which constituted 56.4% of the population with male literacy of 63.8% and female literacy of 47.9%. The effective literacy rate of 7+ population of Jewar was 66.9%, of which male literacy rate was 75.9% and female literacy rate was 56.7%. The Scheduled Castes population was 7,087. Jewar had 4623 households in 2011.

Jewar falls under Jewar Assembly constituency represented by a MLA.

Noida, Dadri, Jewar, Khurja and Sikandrabad falls under the Gautam Buddha Nagar Lok Sabha constituency, represented by an MP.