Udaipur District is a district of Rajasthan state in western India. The historic city of Udaipur is the administrative headquarters of the district.

Udaipur District bounded on the northwest by the Aravalli Range, across which lie the districts of Sirohi and Pali. It is bounded on the north by Rajsamand District, on the east by Chittaurgarh District, on the southeast by Banswara District, on the south by Dungarpur District, and on the southwest by the state of Gujarat. It is part of the Mewar region of Rajasthan.

The district is generally hilly. The western portion of the district is drained by the Sabarmati River, which originates in the Aravalli Range of Udaipur District flows south into Gujarat. The northern portion of the district is drained by tributaries of the Banas River, including the Ahar River, which flows through the City of Udaipur. The southern and central portion of the district is drained by tributaries of the Mahi River, including the Som and the Gomati. Dhebar Lake, also known as Jaisamand Lake, has an area of 50 km² (20 square miles) when full, and was created in the 17th century when Rana Jai Singh of Udaipur built a marble dam across the Gomati.