According to the
2022 Bangladeshi census, Dinajpur Sadar Upazila had 135,479 households and a population of 549,184. 8.26% of the population were under 5 years of age. Dinajpur Sadar had a literacy rate (age 7 and over) of 82.78%: 84.96% for males and 80.55% for females, and a sex ratio of 102.96 males for every 100 females. 233,347 (42.49%) lived in urban areas. Ethnic population is 5891 (1.07%) of which 4442 were
Santal. According to the
2011 Census of Bangladesh, Dinajpur Sadar Upazila had 111,779 households and a population of 484,597. 94,188 (19.44%) were under 10 years of age. Dinajpur Sadar had a literacy rate (age 7 and over) of 64.26%, compared to the national average of 51.8%, and a sex ratio of 956 females per 1000 males. 191,329 (39.48%) lived in urban areas. Ethnic population was 6,607 (1.36%), of which
Santal were 4,191,
Oraon 828 and Barman 641. As of the
1991 Bangladesh census, Dinajpur Sadar has a population of 357,888. Males constitute 52.08% of the population, and females 47.92%. This Upazila's eighteen up population is 187,016. Dinajpur Sadar has an average literacy rate of 41.1% (7+ years), and the national average of 32.4% literate. ==Administration==