The original town was situated on the left bank of the Gomti. It is said to have been founded by Kusa, son of Rama, and to have been named after him Kusapura or Kusabhavanpur. This ancient city has been identified by General Cunnigham with the Kusapur mentioned by Hiuentsang, the Chinese traveller. He states that there was in his time a dilapidated stupa of Ashoka and that Buddha taught here for six months. There are Buddhist remains still visible at Mahmoodpur , a village, 8 km distant to the north-west of Sultanpur.

In Chowk there is a clock tower. On the bank of Gomti is Sitakund, where Sita bathed as she accompanied her husband (the Lord Rama) on his exile. Bathing fairs are held there in Chaitra and Kartika. In civil lines opposite the collectorate is a church known as Christ Church which was opened and consecrated on the 16th November 1869. Next to the church, on the south side, stands Victoria Manzil, built in commemoration of the first jubilee of Queen Victoria. Now its is called as Sunder Lal Memorial Hall and it houses the office of the Municipal Board. A stadium, named as Pant stadium has been built in the city in 1954-55.

Apart from this, there are some important tourist places in the rural areas of Sultanpur.