Aligarh District is a district in the northern Indian state of Uttar Pradesh.The Aligarh District belongs to Aligarh Division.

According to the 2011 census Aligarh district has a population of 36,73,849, roughly equal to the nation of Mauritania or the US state of Oklahoma.This gives it a ranking of 76th in India (out of a total of 640).The district has a population density of 1,007 inhabitants per square kilometre (2,610/sq mi).Its population growth rate over the decade 2001-2011 was 22.78%.Aligarh has a sex ratio of 876 females for every 1000 males, and a literacy rate of 69.61%.

With around 30,000 students, Aligarh Muslim University is the centre of higher education in Aligarh. The university offers more than 250 courses in both traditional and modern fields of education. In addition, there are many decent schools and colleges for primary and secondary level education.