Deeg is a town and a municipality in Bharatpur district in the state of Rajasthan, India. It is situated 32 kilometres north of Bharatpur and 98 kilometres north of Agra.
In Hindu mythology, Deeg was situated along the parikrama path of Krishna, which started at Goverdhan, 14 kilometres from Deeg. Some people identify it as the ancient town of "Dirgha" or "Dirghapur" mentioned in the epic Skanda Purana. Deeg was the first capital of the Sinsinwar Hindu Jat state of Bharatpur, when Maharaja Badan Singh was proclaimed its ruler in 1722. In 1730, Maharaja Suraj Mal erected the strong fortress of Deeg. After Suraj Mal moved the capital to Bharatpur, Deeg became the second capital of the rulers of Bharatpur princely state. It is known for its number of forts, palaces, gardens and fountains.