The Port of Shanghai (port code: CNSHA) is the busiest container port in the world. It is located in the middle of the coastline of mainland China and at the mouth of the Yangtze River.

In 2010, the container throughput of the Port of Shanghai reached 29.05 million TEUs, surpassing the port of Singapore by about 500,000 TEUs, making it the world's largest container port for the first time. In 2011, the Port of Shanghai became the first port in the world with a container throughput of more than 30 million TEUs and continues to rank first in the world in cargo throughput and container throughput. In 2023, the container throughput of the Port of Shanghai exceeded 49 million TEUs, ranking first in the world for 14 consecutive years.

As of 2021, the Port of Shanghai has established container cargo trade with more than 500 ports in 221 countries and regions worldwide and has more than 80 international routes. The top 20 liner companies in the world all have branches in Shanghai.

The Port of Shanghai has multiple port areas, mainly located on both sides of the Huangpu River (such as Zhanghuabang, Jungong Road, Gongqing, Zhujiamen, Longwu, and other port areas), the south bank of the Yangtze River estuary (such as Baoshan, Luojing, Waigaoqiao and other port areas), and the mouth of Hangzhou Bay (Yangshan Port).

In the early days, the port areas of the Port of Shanghai were concentrated in the middle and lower reaches of the Huangpu River. However, due to the gradual inability of the Huangpu River to meet the busy cargo requirements and water depth restrictions for large cargo ships, the Port of Shanghai began to expand to the south bank of the Yangtze River Estuary in the 1990s. In 2005, it began to use Yangshan Port at the mouth of Hangzhou Bay to meet the docking requirements of Post-Panamax cargo ships. (Yangshan Port is a port formed by reclamation at the mouth of Hangzhou Bay. It can accommodate the docking and entry of cargo ships with a draft of more than 15 meters.)

The business operations of the Port of Shanghai mainly include loading and unloading, warehousing, logistics, ship towing, pilotage, foreign ship agency, foreign ship tally, sea-rail multimodal transport, transfer services, and waterway passenger transport services.

The main cargo categories handled by the Port of Shanghai are containers, coal, metal ore, petroleum and its products, steel, mining and construction materials, machinery and equipment, etc.