At the 2011 census, this district had a population of 4,661,452 (3rd highest in UP), with 2,481,803 males and 2,179,649 females. It contributes 2.33% of the total population of UP. It has highest density of population in UP with 4060 persons per square km. It is second in population growth rate with 40.66%. The average literacy rate in 2011 was 85%, which is the highest in UP. This is revised to 3,323,241 after the split of Hapur district.