Jiangsu is a province of the People's Republic of China, located along the east coast of the country.

The name "Jiangsu" comes from Jiang, short for the city of Jiangning (now Nanjing), and Su, for the city of Suzhou. The abbreviation for this province is ? (Hanyu Pinyin: Su), the second character of its name.

Jiangsu borders Shandong in the north, Anhui to the west, and Zhejiang and Shanghai to the south. Jiangsu has a coastline of over 1,000 km along the Yellow Sea, and the Yangtze River passes through its southern parts.

Jiangsu is very flat and low-lying, with plains covering 68 percent of its total area (water covers another 18 percent), and most of the province not more than 50 m above sea level. Jiangsu is also laced with a well-developed irrigation system, which earned it (especially the southern half) the moniker of (shuixiang "land of water"); the southern city of Suzhou is so crisscrossed with canals that it has been dubbed "Venice of the East".

Demographic indicators in 2000:

Population: 74.058 million (urban: 34.637 million; rural: 39.421 million) (2003)
Birth rate: 9.04 per 1000 (2003)
Death rate: 7.03 per 1000 (2003)
Sex ratio: 102.55 males per 100 females
Average family size: 3.25
Han Chinese proportion: 99.64%
Illiteracy rate: 7.88%

Jiangsu has an extensive irrigation system supporting its agriculture, which is based primarily on rice and wheat, followed by maize and sorghum. Main cash crops include cotton, soybeans, peanuts, rape, sesame, ambary hemp, and tea. Other products include peppermint, spearmint, bamboo, medicinal herbs, apples, pears, peaches, loquats, ginkgo. Silkworms also form an important part of Jiangsu's agriculture, with the Lake Taihu region to the south a major base of silk production in China. Jiangsu is also an important producer of freshwater fish and other aquatic products.

Jiangsu has coal, petroleum, and natural gas deposits, but its most significant mineral produces are non-metal minerals such as halite (rock salt), sulfur, phosphorus, as well as marble. The salt mines of Huaiyin have more than 0.4 trillion tonnes of deposits, one of the highest in China.

Jiangsu is historically oriented towards light industries such as textiles and food industry. Since 1949 Jiangsu has also developed heavy industries such as chemical industry and construction materials. The economic reforms of Deng Xiaoping has greatly benefited southern cities, especially Suzhou and Wuxi, which outstrip the provincial capital Nanjing in total output. In the eastern outskirts of Suzhou, Singapore has built the Suzhou Industrial Park, a flagship of China-Singapore cooperation and the only industrial park in China that is in its entirety the investment of one single foreign country.

Jiangsu is very wealthy among the provinces of China, with the second highest total gross domestic product (after Guangdong Province). Its GDP per capita was 14500 Renminbi in 2002, but geographical disparity is great, and southern cities like Suzhou and Wuxi have GDP per capita around twice of the provincial average, making south Jiangsu one of the most prosperous regions in China.

Two main subdivisions of the Chinese language, Mandarin and Wu, are spoken in different parts of Jiangsu. Dialects of Mandarin are spoken over most of northern Jiangsu and central Jiangsu, as well as parts of southern Jiangsu, such as in the provincial capital, Nanjing; a more detailed classification would put dialects of northern Jiangsu (such as in Xuzhou) under "Zhongyuan dialects" and those of central and southern Jiangsu (such as in Yangzhou or Nanjing) under "Jianghuai dialects". Dialects of Wu are spoken in the southernmost parts of Jiangsu, such as in Suzhou, Wuxi, and Changzhou. Mandarin and Wu are not mutually intelligible and the dividing line is sharp and well-defined.

Jiangsu is rich in cultural traditions. Kunqu, originating in Kunshan, is one of the most renowned and prestigious forms of Chinese opera. Pingtan, a form of storytelling accompanied by music, is also popular: it can be subdivided into types by origin: Suzhou Pingtan (of Suzhou), Yangzhou Pingtan (of Yangzhou), and Nanjing Pingtan (of Nanjing). Xiju, a form of traditional Chinese opera, is popular in Wuxi, while Huaiju is popular further north, around Yancheng. Jiangsu cuisine is one of the eight great traditions of the cuisine of China.

Suzhou is also famous for its silk, embroidery art, jasmine tea, stone bridges, pagodas, and its classical gardens. Nearby Yixing is famous for its teaware, and Yangzhou is famous for its lacquerware and jadeware. Nanjing's yunjin is a famous form of woven silk, while Wuxi is famous for its peaches.

Stewed Crab with Clear Soup, Long-boiled and Dry-shredded Meat, Duck Triplet, Crystal Meat, Squirrel with Mandarin Fish, and Liangxi Crisp Eel

The area around Wuxi and Tai Hu is called "the land of fish and rice". The nickname is often extended to the entire area, and to the whole of Jiangsu Province.