Sonargaon (Bengali: সোনারগাঁও) is an upazila of Narayanganj District in the Division of Dhaka, Bangladesh.

According to the 2022 Bangladeshi census, Sonargaon Upazila had 142,631 households and a population of 551,841. 9.24% of the population were under 5 years of age. Sonargaon had a literacy rate (age 7 and over) of 78.04%: 79.78% for males and 76.20% for females, and a sex ratio of 105.72 males for every 100 females. 106,386 (19.28%) lived in urban areas.

According to 2011 Census of Bangladesh, Sonargaon Upazila had 89,565 households and a population of 400,358. 88,186 (22.03%) were under 10 years of age. Sonargaon had a literacy rate (age 7 and over) of 54.6%, compared to the national average of 51.8%, and a sex ratio of 958 females per 1000 males. 32,796 (8.19%) lived in urban areas.

As of the 1991 Bangladeshi census, Sonargaon has a population of 261,881 in 44,405 households. Males constitute 52.11% of the population, and females 47.89%. The population over 18 years of age is 118,319.

Sonargaon has an average literacy rate of 33.1% (7+ years), compared with the national average of 32.4%.

Local food includes Gurer Zilapi, Murali, Binni Khoi, Shwandesh, etc.

Sonargaon Upazila is divided into Sonargaon Municipality and ten union parishads: Baidyerbazar, Baradi, Jampur, Kachpur, Mugrapara, Naogaon, Pirijpur, Sadipur, Shambhupura, and Shanmandi. The union parishads are subdivided into 351 mauzas and 487 villages.

Sonargaon Municipality is subdivided into 9 wards and 60 mahallas.