Oel and Singahi were established in Mughal era. Under the Nawabs of Awadh, the old system of sarkars and mahals remained in use until the reign of Asaf-ud-Daula, who replaced them with chaklas. The entire area of Lakhimpur Kheri district was included in the chakla of Khairabad, which also included most of Hardoi and Sitapur districts, but at times Muhamdi formed a separate chakla, and some of the southeastern parganas were occasionally put under the chakla of Bahraich. Modern era In the year 1801, when Rohilkhand was ceded to the British, part of this district was included in the cession, but after the Anglo–Nepalese War of 1814-1816 it was restored to Oudh. On the annexation of Oudh in 1856 the west of the present area was formed into a district called Mohammadi and the east into Mallanpur, which also included part of Sitapur. In the Indian Rebellion of 1857 Mohammadi became one of the chief centres of Indian independence movement in northern Oudh. The refugees from Shahjahanpur reached Mohammadi on 2 June 1857, and two days later Mohammadi was abandoned, most of the British party were shot down on the way to Sitapur, and the survivors died or were murdered later in Lucknow. The British officials in Mallanpur, with a few who had fled from Sitapur, escaped to Nepal, where later on most of them died. Till October 1858, British officials did not make any other attempt to regain control of the district. By the end of 1858 British officials regained the control and the headquarters of the single district then formed were moved to Lakhlmpur shortly afterwards. In, 2021 eight people were killed and eleven people were injured in the Lakhimpur Kheri violence when a car rammed into the protesting farmers. Geography The district is within the Terai lowlands at the base of the Himalayas, with several rivers and lush green vegetation. Situated between 27.6° and 28.6° north latitude and 80.34° and 81.30° east longitudes, and about in area, it is roughly triangular in shape, the flattened apex pointing north. The district is located at about the height of 147 meters above sea level. Lakhimpur Kheri is bounded on the north by the river Mohan, separating it from Nepal; on the east by the Kauriala river (branch of the Ghaghara), separating it from Bahraich; on the south by Sitapur and Hardoi; and on the west by Pilibhit and Shahjahanpur.