Tongzhou District (Tongzhou City), the municipal district of Nantong City, Jiangsu Province, one of the main urban areas of Nantong City, is located in the southeast of Jiangsu Province, on the northeast wing of the Yangtze River Delta, bordering the Yellow Sea in the east, the Yangtze River in the west, Haimen District in the southeast, Chongchuan District in the west, and Rugao City and Rudong County in the west and north; The coastline is 15.97 kilometers long, and the river coastline is 10.77 kilometers long, with a total area of 1193.95 square kilometers, including 1156.67 square kilometers of land area and 0.37 square kilometers of the Yangtze River area. At the end of 2018, Tongzhou District had 12 towns and 4 streets under its jurisdiction. According to the data of the seventh population census, as of 0:00 on November 1, 2020, the permanent resident population of Tongzhou District was 1258739.

Tongzhou District is bordered by the river and the sea, the east is China's "Tongzhou Bay River-Sea Linkage Development Demonstration Zone", the west is Nantong Binjiang New Area, the south is connected to the Sutong Yangtze River Bridge, the north is crossed by the world-class Shanghai-Shutong Yangtze River Highway and Railway Bridge, and Nantong Xingdong International Airport is located in the territory. Tongzhou culture mainly belongs to Wuyue culture, and Tongzhou people mainly use Wu language, belonging to Jiangsu and Zhejiang ethnic groups.

Tongzhou is China's famous textile town, architecture town, education town, and Chinese folk art town. It has the world's third largest Nantong Home Textile City, and has won 52 "Luban Awards", the highest award in the national construction industry. It has won the title of "National Advanced County (City, District) for Science and Technology Progress" for six consecutive times.

In 2020, Tongzhou District will achieve a gross regional product of 146.25 billion yuan, an increase of 4.6% over the previous year (the same below) at comparable prices. In terms of industries, the added value of the primary industry was 6.34 billion yuan, up 2.6%; The added value of the secondary industry was 73.16 billion yuan, up 4.2%; The added value of the tertiary industry was 66.75 billion yuan, up 5.2%. The proportion of the three industrial structures was adjusted from 4.3:51.9:43.8 in the previous year to 4.3:50.1:45.6.

In October 2021, it was selected into the list of "Top 100 Smart Cities in China in 2021".